28956357 has 12 divisors (see below), whose sum is σ = 41874924. Its totient is φ = 19281600.

The previous prime is 28956349. The next prime is 28956377. The reversal of 28956357 is 75365982.

It is a happy number.

28956357 is a `hidden beast` number, since 2 + 8 + 9 + 5 + 635 + 7 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 7667361 + 21288996 = 2769^2 + 4614^2 .

It is not a de Polignac number, because 28956357 - 2³ = 28956349 is a prime.

It is a super-2 number, since 2×28956357² = 1676941221422898, which contains 22 as substring.

Its product of digits (453600) is a multiple of the sum of its prime factors (3780).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28956337) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10473 + ... + 12945.

It is an arithmetic number, because the mean of its divisors is an integer number (3489577).

Almost surely, 2^28956357 is an apocalyptic number.

It is an amenable number.

28956357 is a deficient number, since it is larger than the sum of its proper divisors (12918567).

28956357 is a wasteful number, since it uses less digits than its factorization.

28956357 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3780 (or 3777 counting only the distinct ones).

The product of its digits is 453600, while the sum is 45.

The square root of 28956357 is about 5381.1111306123. Note that the first 4 decimals coincide. The cubic root of 28956357 is about 307.0774843588.

The spelling of 28956357 in words is "twenty-eight million, nine hundred fifty-six thousand, three hundred fifty-seven".