87494490 has 24 divisors (see below), whose sum is σ = 227485908. Its totient is φ = 23331840.

The previous prime is 87494489. The next prime is 87494503. The reversal of 87494490 is 9449478.

87494490 is a `hidden beast` number, since 8 + 74 + 94 + 490 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 80946009 + 6548481 = 8997^2 + 2559^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 485991 + ... + 486170.

Almost surely, 2^87494490 is an apocalyptic number.

87494490 is an abundant number, since it is smaller than the sum of its proper divisors (139991418).

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

87494490 is a wasteful number, since it uses less digits than its factorization.

87494490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 972174 (or 972171 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The square root of 87494490 is about 9353.8489404095. The cubic root of 87494490 is about 443.9426819118.

The spelling of 87494490 in words is "eighty-seven million, four hundred ninety-four thousand, four hundred ninety".