87772520 has 32 divisors (see below), whose sum is σ = 215442720. Its totient is φ = 31917120.

The previous prime is 87772519. The next prime is 87772541. The reversal of 87772520 is 2527778.

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, 99302 + ... + 100181.

It is an arithmetic number, because the mean of its divisors is an integer number (6732585).

Almost surely, 2^87772520 is an apocalyptic number.

It is an amenable number.

87772520 is an abundant number, since it is smaller than the sum of its proper divisors (127670200).

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

87772520 is a wasteful number, since it uses less digits than its factorization.

87772520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199505 (or 199501 counting only the distinct ones).

The product of its (nonzero) digits is 54880, while the sum is 38.

The square root of 87772520 is about 9368.6989491604. The cubic root of 87772520 is about 444.4124214890.

The spelling of 87772520 in words is "eighty-seven million, seven hundred seventy-two thousand, five hundred twenty".