87519720 has 32 divisors (see below), whose sum is σ = 262559520. Its totient is φ = 23338560.

The previous prime is 87519703. The next prime is 87519737. The reversal of 87519720 is 2791578.

It is an interprime number because it is at equal distance from previous prime (87519703) and next prime (87519737).

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, 364546 + ... + 364785.

It is an arithmetic number, because the mean of its divisors is an integer number (8204985).

Almost surely, 2^87519720 is an apocalyptic number.

It is an amenable number.

87519720 is an abundant number, since it is smaller than the sum of its proper divisors (175039800).

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

87519720 is a wasteful number, since it uses less digits than its factorization.

87519720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 729345 (or 729341 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 39.

The square root of 87519720 is about 9355.1974858899. The cubic root of 87519720 is about 443.9853497317.

The spelling of 87519720 in words is "eighty-seven million, five hundred nineteen thousand, seven hundred twenty".