87756740 has 12 divisors (see below), whose sum is σ = 184289196. Its totient is φ = 35102688.

The previous prime is 87756727. The next prime is 87756751. The reversal of 87756740 is 4765778.

It can be written as a sum of positive squares in 2 ways, for example, as 54671236 + 33085504 = 7394^2 + 5752^2 .

It is a junction number, because it is equal to n+sod(n) for n = 87756691 and 87756700.

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, 2193899 + ... + 2193938.

It is an arithmetic number, because the mean of its divisors is an integer number (15357433).

Almost surely, 2^87756740 is an apocalyptic number.

It is an amenable number.

87756740 is an abundant number, since it is smaller than the sum of its proper divisors (96532456).

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

87756740 is a wasteful number, since it uses less digits than its factorization.

87756740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4387846 (or 4387844 counting only the distinct ones).

The product of its (nonzero) digits is 329280, while the sum is 44.

The square root of 87756740 is about 9367.8567452753. The cubic root of 87756740 is about 444.3857873052.

The spelling of 87756740 in words is "eighty-seven million, seven hundred fifty-six thousand, seven hundred forty".