87720260 has 24 divisors (see below), whose sum is σ = 184524480. Its totient is φ = 35028704.

The previous prime is 87720239. The next prime is 87720263. The reversal of 87720260 is 6202778.

It is not an unprimeable number, because it can be changed into a prime (87720263) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9551 + ... + 16329.

It is an arithmetic number, because the mean of its divisors is an integer number (7688520).

Almost surely, 2^87720260 is an apocalyptic number.

It is an amenable number.

87720260 is an abundant number, since it is smaller than the sum of its proper divisors (96804220).

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

87720260 is a wasteful number, since it uses less digits than its factorization.

87720260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7435 (or 7433 counting only the distinct ones).

The product of its (nonzero) digits is 9408, while the sum is 32.

The square root of 87720260 is about 9365.9094593104. The cubic root of 87720260 is about 444.3242025185.

The spelling of 87720260 in words is "eighty-seven million, seven hundred twenty thousand, two hundred sixty".