28531746 has 24 divisors (see below), whose sum is σ = 65455884. Its totient is φ = 8951040.

The previous prime is 28531733. The next prime is 28531759. The reversal of 28531746 is 64713582.

It is an interprime number because it is at equal distance from previous prime (28531733) and next prime (28531759).

It can be written as a sum of positive squares in 2 ways, for example, as 26163225 + 2368521 = 5115^2 + 1539^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 28531746.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 46315 + ... + 46926.

Almost surely, 2^28531746 is an apocalyptic number.

28531746 is an abundant number, since it is smaller than the sum of its proper divisors (36924138).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28531746 is a wasteful number, since it uses less digits than its factorization.

28531746 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93266 (or 93263 counting only the distinct ones).

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

The square root of 28531746 is about 5341.5115838122. The cubic root of 28531746 is about 305.5691103090.

The spelling of 28531746 in words is "twenty-eight million, five hundred thirty-one thousand, seven hundred forty-six".