28917452624 has 40 divisors (see below), whose sum is σ = 56898311400. Its totient is φ = 14234738688.

The previous prime is 28917452621. The next prime is 28917452639. The reversal of 28917452624 is 42625471982.

It can be written as a sum of positive squares in 4 ways, for example, as 4101121600 + 24816331024 = 64040^2 + 157532^2 .

It is a super-2 number, since 2×28917452624² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28917452621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 628352 + ... + 672800.

It is an arithmetic number, because the mean of its divisors is an integer number (1422457785).

Almost surely, 2^28917452624 is an apocalyptic number.

It is an amenable number.

28917452624 is a deficient number, since it is larger than the sum of its proper divisors (27980858776).

28917452624 is a wasteful number, since it uses less digits than its factorization.

28917452624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45087 (or 45081 counting only the distinct ones).

The product of its digits is 1935360, while the sum is 50.

The spelling of 28917452624 in words is "twenty-eight billion, nine hundred seventeen million, four hundred fifty-two thousand, six hundred twenty-four".