28524420720 has 60 divisors (see below), whose sum is σ = 95794515336. Its totient is φ = 7606512000.

The previous prime is 28524420647. The next prime is 28524420733. The reversal of 28524420720 is 2702442582.

28524420720 is a `hidden beast` number, since 28 + 524 + 42 + 0 + 72 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (60).

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, 19807906 + ... + 19809345.

Almost surely, 2^28524420720 is an apocalyptic number.

28524420720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28524420720 is an abundant number, since it is smaller than the sum of its proper divisors (67270094616).

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

28524420720 is a wasteful number, since it uses less digits than its factorization.

28524420720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39617270 (or 39617261 counting only the distinct ones).

The product of its (nonzero) digits is 71680, while the sum is 36.

The spelling of 28524420720 in words is "twenty-eight billion, five hundred twenty-four million, four hundred twenty thousand, seven hundred twenty".