28457956 has 6 divisors (see below), whose sum is σ = 49801430. Its totient is φ = 14228976.

The previous prime is 28457941. The next prime is 28457963. The reversal of 28457956 is 65975482.

It can be written as a sum of positive squares in only one way, i.e., 28451556 + 6400 = 5334^2 + 80^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3557241 + ... + 3557248.

Almost surely, 2^28457956 is an apocalyptic number.

It is an amenable number.

28457956 is a deficient number, since it is larger than the sum of its proper divisors (21343474).

28457956 is a wasteful number, since it uses less digits than its factorization.

28457956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7114493 (or 7114491 counting only the distinct ones).

The product of its digits is 604800, while the sum is 46.

The square root of 28457956 is about 5334.5998912758. The cubic root of 28457956 is about 305.3054576655.

It can be divided in two parts, 284579 and 56, that added together give a triangular number (284635 = T₇₅₄).

The spelling of 28457956 in words is "twenty-eight million, four hundred fifty-seven thousand, nine hundred fifty-six".