28497924 has 72 divisors (see below), whose sum is σ = 88670400. Its totient is φ = 7515072.

The previous prime is 28497901. The next prime is 28497947. The reversal of 28497924 is 42979482.

It is an interprime number because it is at equal distance from previous prime (28497901) and next prime (28497947).

It is a self number, because there is not a number n which added to its sum of digits gives 28497924.

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, 1074 + ... + 7625.

Almost surely, 2^28497924 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28497924, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44335200).

28497924 is an abundant number, since it is smaller than the sum of its proper divisors (60172476).

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

28497924 is a wasteful number, since it uses less digits than its factorization.

28497924 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8729 (or 8724 counting only the distinct ones).

The product of its digits is 290304, while the sum is 45.

The square root of 28497924 is about 5338.3446872603. The cubic root of 28497924 is about 305.4483203547.

The spelling of 28497924 in words is "twenty-eight million, four hundred ninety-seven thousand, nine hundred twenty-four".