28383057 has 12 divisors (see below), whose sum is σ = 41560324. Its totient is φ = 18662400.

The previous prime is 28383023. The next prime is 28383059. The reversal of 28383057 is 75038382.

It can be written as a sum of positive squares in 2 ways, for example, as 17943696 + 10439361 = 4236^2 + 3231^2 .

It is not a de Polignac number, because 28383057 - 2⁶ = 28382993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28383059) 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, 20944 + ... + 22257.

Almost surely, 2^28383057 is an apocalyptic number.

It is an amenable number.

28383057 is a deficient number, since it is larger than the sum of its proper divisors (13177267).

28383057 is a wasteful number, since it uses less digits than its factorization.

28383057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43280 (or 43277 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The square root of 28383057 is about 5327.5751519805. The cubic root of 28383057 is about 305.0373760520.

The spelling of 28383057 in words is "twenty-eight million, three hundred eighty-three thousand, fifty-seven".