28150520 has 16 divisors (see below), whose sum is σ = 63338760. Its totient is φ = 11260192.

The previous prime is 28150517. The next prime is 28150541. The reversal of 28150520 is 2505182.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 351842 + ... + 351921.

Almost surely, 2^28150520 is an apocalyptic number.

28150520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28150520 is an abundant number, since it is smaller than the sum of its proper divisors (35188240).

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

28150520 is a wasteful number, since it uses less digits than its factorization.

28150520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 703774 (or 703770 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 23.

The square root of 28150520 is about 5305.7063620219. The cubic root of 28150520 is about 304.2020528877.

The spelling of 28150520 in words is "twenty-eight million, one hundred fifty thousand, five hundred twenty".