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28497504 = 253742407
BaseRepresentation
bin110110010110…
…1011001100000
31222121211020010
41230231121200
524243410004
62454444520
7464140050
oct154553140
958554203
1028497504
11150a4662
129663740
135b9a139
143adb560
15277da89
hex1b2d660

28497504 has 48 divisors (see below), whose sum is σ = 85494528. Its totient is φ = 8141952.

The previous prime is 28497503. The next prime is 28497509. The reversal of 28497504 is 40579482.

28497504 = T2512 + T2513 + ... + T2520.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28497503) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20532 + ... + 21875.

It is an arithmetic number, because the mean of its divisors is an integer number (1781136).

Almost surely, 228497504 is an apocalyptic number.

28497504 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

28497504 is an abundant number, since it is smaller than the sum of its proper divisors (56997024).

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

28497504 is a wasteful number, since it uses less digits than its factorization.

28497504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42427 (or 42419 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 39.

The square root of 28497504 is about 5338.3053490785. The cubic root of 28497504 is about 305.4468197902.

The spelling of 28497504 in words is "twenty-eight million, four hundred ninety-seven thousand, five hundred four".

Divisors: 1 2 3 4 6 7 8 12 14 16 21 24 28 32 42 48 56 84 96 112 168 224 336 672 42407 84814 127221 169628 254442 296849 339256 508884 593698 678512 890547 1017768 1187396 1357024 1781094 2035536 2374792 3562188 4071072 4749584 7124376 9499168 14248752 28497504