87947740 has 24 divisors (see below), whose sum is σ = 186389280. Its totient is φ = 34855488.

The previous prime is 87947729. The next prime is 87947773. The reversal of 87947740 is 4774978.

It is a super-2 number, since 2×87947740² = 15469609942215200, which contains 22 as substring.

It is a congruent number.

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, 17992 + ... + 22351.

It is an arithmetic number, because the mean of its divisors is an integer number (7766220).

Almost surely, 2^87947740 is an apocalyptic number.

It is an amenable number.

87947740 is an abundant number, since it is smaller than the sum of its proper divisors (98441540).

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

87947740 is a wasteful number, since it uses less digits than its factorization.

87947740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40461 (or 40459 counting only the distinct ones).

The product of its (nonzero) digits is 395136, while the sum is 46.

The square root of 87947740 is about 9378.0456386179. The cubic root of 87947740 is about 444.7079512847.

The spelling of 87947740 in words is "eighty-seven million, nine hundred forty-seven thousand, seven hundred forty".