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28578048 = 283127293
BaseRepresentation
bin110110100000…
…1000100000000
31222202220201020
41231001010000
524303444143
62500305440
7464623632
oct155010400
958686636
1028578048
111514a124
1296a2280
135bc79b5
143b1ca52
152797883
hex1b41100

28578048 has 72 divisors (see below), whose sum is σ = 76919808. Its totient is φ = 9418752.

The previous prime is 28578047. The next prime is 28578083. The reversal of 28578048 is 84087582.

It is not an unprimeable number, because it can be changed into a prime (28578047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 97390 + ... + 97682.

Almost surely, 228578048 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28578048, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38459904).

28578048 is an abundant number, since it is smaller than the sum of its proper divisors (48341760).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28578048 is a wasteful number, since it uses less digits than its factorization.

28578048 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 439 (or 425 counting only the distinct ones).

The product of its (nonzero) digits is 143360, while the sum is 42.

The square root of 28578048 is about 5345.8439932344. The cubic root of 28578048 is about 305.7343159289.

The spelling of 28578048 in words is "twenty-eight million, five hundred seventy-eight thousand, forty-eight".

Divisors: 1 2 3 4 6 8 12 16 24 32 48 64 96 127 128 192 254 256 293 381 384 508 586 762 768 879 1016 1172 1524 1758 2032 2344 3048 3516 4064 4688 6096 7032 8128 9376 12192 14064 16256 18752 24384 28128 32512 37211 37504 48768 56256 74422 75008 97536 111633 112512 148844 223266 225024 297688 446532 595376 893064 1190752 1786128 2381504 3572256 4763008 7144512 9526016 14289024 28578048