87478472 has 16 divisors (see below), whose sum is σ = 164249100. Its totient is φ = 43678720.

The previous prime is 87478463. The next prime is 87478477. The reversal of 87478472 is 27487478.

It can be written as a sum of positive squares in 2 ways, for example, as 79103236 + 8375236 = 8894^2 + 2894^2 .

It is not an unprimeable number, because it can be changed into a prime (87478477) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1097 + ... + 13272.

Almost surely, 2^87478472 is an apocalyptic number.

It is an amenable number.

87478472 is a deficient number, since it is larger than the sum of its proper divisors (76770628).

87478472 is a wasteful number, since it uses less digits than its factorization.

87478472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15136 (or 15132 counting only the distinct ones).

The product of its digits is 702464, while the sum is 47.

The square root of 87478472 is about 9352.9926761438. The cubic root of 87478472 is about 443.9155887471.

The spelling of 87478472 in words is "eighty-seven million, four hundred seventy-eight thousand, four hundred seventy-two".