28332357 has 16 divisors (see below), whose sum is σ = 39585792. Its totient is φ = 18002160.

The previous prime is 28332347. The next prime is 28332379. The reversal of 28332357 is 75323382.

It is not a de Polignac number, because 28332357 - 2⁴ = 28332341 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28332347) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3958 + ... + 8504.

It is an arithmetic number, because the mean of its divisors is an integer number (2474112).

Almost surely, 2^28332357 is an apocalyptic number.

It is an amenable number.

28332357 is a deficient number, since it is larger than the sum of its proper divisors (11253435).

28332357 is a wasteful number, since it uses less digits than its factorization.

28332357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4648.

The product of its digits is 30240, while the sum is 33.

The square root of 28332357 is about 5322.8147628863. The cubic root of 28332357 is about 304.8556407230.

Subtracting 28332357 from its reverse (75323382), we obtain a square (46991025 = 6855²).

It can be divided in two parts, 283 and 32357, that added together give a triangular number (32640 = T₂₅₅).

The spelling of 28332357 in words is "twenty-eight million, three hundred thirty-two thousand, three hundred fifty-seven".