28766520 has 48 divisors (see below), whose sum is σ = 93492360. Its totient is φ = 7670976.

The previous prime is 28766519. The next prime is 28766539. The reversal of 28766520 is 2566782.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

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, 39594 + ... + 40313.

Almost surely, 2^28766520 is an apocalyptic number.

28766520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28766520 is an abundant number, since it is smaller than the sum of its proper divisors (64725840).

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

28766520 is a wasteful number, since it uses less digits than its factorization.

28766520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79924 (or 79917 counting only the distinct ones).

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

The square root of 28766520 is about 5363.4429240927. The cubic root of 28766520 is about 306.4049489392.

The spelling of 28766520 in words is "twenty-eight million, seven hundred sixty-six thousand, five hundred twenty".