28457955 has 24 divisors (see below), whose sum is σ = 50008608. Its totient is φ = 14967936.

The previous prime is 28457941. The next prime is 28457963. The reversal of 28457955 is 55975482.

28457955 is a `hidden beast` number, since 28 + 4 + 579 + 55 = 666.

It is not a de Polignac number, because 28457955 - 2⁴ = 28457939 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 28457955.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1047 + ... + 7616.

It is an arithmetic number, because the mean of its divisors is an integer number (2083692).

Almost surely, 2^28457955 is an apocalyptic number.

28457955 is a deficient number, since it is larger than the sum of its proper divisors (21550653).

28457955 is a wasteful number, since it uses less digits than its factorization.

28457955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8747 (or 8744 counting only the distinct ones).

The product of its digits is 504000, while the sum is 45.

The square root of 28457955 is about 5334.5997975481. The cubic root of 28457955 is about 305.3054540894.

The spelling of 28457955 in words is "twenty-eight million, four hundred fifty-seven thousand, nine hundred fifty-five".