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28557932 = 22133714843
BaseRepresentation
bin110110011110…
…0001001101100
31222201220010012
41230330021230
524302323212
62500032352
7464511164
oct154741154
958656105
1028557932
1115135aa7
1296926b8
135bbb7b0
143b155a4
152791922
hex1b3c26c

28557932 has 24 divisors (see below), whose sum is σ = 55279056. Its totient is φ = 12823488.

The previous prime is 28557929. The next prime is 28557941. The reversal of 28557932 is 23975582.

It is a self number, because there is not a number n which added to its sum of digits gives 28557932.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5498 + ... + 9345.

It is an arithmetic number, because the mean of its divisors is an integer number (2303294).

Almost surely, 228557932 is an apocalyptic number.

It is an amenable number.

28557932 is a deficient number, since it is larger than the sum of its proper divisors (26721124).

28557932 is a wasteful number, since it uses less digits than its factorization.

28557932 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14897 (or 14895 counting only the distinct ones).

The product of its digits is 151200, while the sum is 41.

The square root of 28557932 is about 5343.9622004651. The cubic root of 28557932 is about 305.6625639430.

The spelling of 28557932 in words is "twenty-eight million, five hundred fifty-seven thousand, nine hundred thirty-two".

Divisors: 1 2 4 13 26 37 52 74 148 481 962 1924 14843 29686 59372 192959 385918 549191 771836 1098382 2196764 7139483 14278966 28557932