28457758 has 24 divisors (see below), whose sum is σ = 50545872. Its totient is φ = 11770752.

The previous prime is 28457753. The next prime is 28457771. The reversal of 28457758 is 85775482.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28457753) 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, 10566 + ... + 12982.

It is an arithmetic number, because the mean of its divisors is an integer number (2106078).

Almost surely, 2^28457758 is an apocalyptic number.

28457758 is a deficient number, since it is larger than the sum of its proper divisors (22088114).

28457758 is a wasteful number, since it uses less digits than its factorization.

28457758 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2484 (or 2455 counting only the distinct ones).

The product of its digits is 627200, while the sum is 46.

The square root of 28457758 is about 5334.5813331507. The cubic root of 28457758 is about 305.3047495961.

It can be divided in two parts, 284577 and 58, that added together give a triangular number (284635 = T₇₅₄).

The spelling of 28457758 in words is "twenty-eight million, four hundred fifty-seven thousand, seven hundred fifty-eight".