87804520 has 16 divisors (see below), whose sum is σ = 197560260. Its totient is φ = 35121792.

The previous prime is 87804499. The next prime is 87804523. The reversal of 87804520 is 2540878.

It can be written as a sum of positive squares in 2 ways, for example, as 83503044 + 4301476 = 9138^2 + 2074^2 .

It is not an unprimeable number, because it can be changed into a prime (87804523) 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, 1097517 + ... + 1097596.

Almost surely, 2^87804520 is an apocalyptic number.

It is an amenable number.

87804520 is an abundant number, since it is smaller than the sum of its proper divisors (109755740).

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

87804520 is a wasteful number, since it uses less digits than its factorization.

87804520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2195124 (or 2195120 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 34.

The square root of 87804520 is about 9370.4066080400. The cubic root of 87804520 is about 444.4664227094.

The spelling of 87804520 in words is "eighty-seven million, eight hundred four thousand, five hundred twenty".