28915464 has 32 divisors (see below), whose sum is σ = 73477440. Its totient is φ = 9480000.

The previous prime is 28915459. The next prime is 28915489. The reversal of 28915464 is 46451982.

It is a super-2 number, since 2×28915464² = 1672208116670592, which contains 22 as substring.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8412 + ... + 11339.

It is an arithmetic number, because the mean of its divisors is an integer number (2296170).

Almost surely, 2^28915464 is an apocalyptic number.

28915464 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

28915464 is an abundant number, since it is smaller than the sum of its proper divisors (44561976).

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

28915464 is a wasteful number, since it uses less digits than its factorization.

28915464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19821 (or 19817 counting only the distinct ones).

The product of its digits is 69120, while the sum is 39.

The square root of 28915464 is about 5377.3101082233. The cubic root of 28915464 is about 306.9328617062.

It can be divided in two parts, 289 and 15464, that added together give a triangular number (15753 = T₁₇₇).

The spelling of 28915464 in words is "twenty-eight million, nine hundred fifteen thousand, four hundred sixty-four".