87447740 has 24 divisors (see below), whose sum is σ = 185047632. Its totient is φ = 34711040.

The previous prime is 87447739. The next prime is 87447769. The reversal of 87447740 is 4774478.

It is a super-2 number, since 2×87447740² = 15294214462215200, 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, 14069 + ... + 19308.

It is an arithmetic number, because the mean of its divisors is an integer number (7710318).

Almost surely, 2^87447740 is an apocalyptic number.

It is an amenable number.

87447740 is an abundant number, since it is smaller than the sum of its proper divisors (97599892).

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

87447740 is a wasteful number, since it uses less digits than its factorization.

87447740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33517 (or 33515 counting only the distinct ones).

The product of its (nonzero) digits is 175616, while the sum is 41.

The square root of 87447740 is about 9351.3496352131. The cubic root of 87447740 is about 443.8635987682.

The spelling of 87447740 in words is "eighty-seven million, four hundred forty-seven thousand, seven hundred forty".