87804490 has 32 divisors (see below), whose sum is σ = 167895504. Its totient is φ = 32947200.

The previous prime is 87804469. The next prime is 87804499. The reversal of 87804490 is 9440878.

It can be written as a sum of positive squares in 8 ways, for example, as 26040609 + 61763881 = 5103^2 + 7859^2 .

It is not an unprimeable number, because it can be changed into a prime (87804499) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66840 + ... + 68140.

Almost surely, 2^87804490 is an apocalyptic number.

87804490 is a deficient number, since it is larger than the sum of its proper divisors (80091014).

87804490 is a wasteful number, since it uses less digits than its factorization.

87804490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1722.

The product of its (nonzero) digits is 64512, while the sum is 40.

The square root of 87804490 is about 9370.4050072556. The cubic root of 87804490 is about 444.4663720894.

The spelling of 87804490 in words is "eighty-seven million, eight hundred four thousand, four hundred ninety".