87020424 has 48 divisors (see below), whose sum is σ = 236609100. Its totient is φ = 28892544.

The previous prime is 87020407. The next prime is 87020429. The reversal of 87020424 is 42402078.

It can be written as a sum of positive squares in 2 ways, for example, as 86155524 + 864900 = 9282^2 + 930^2 .

It is not an unprimeable number, because it can be changed into a prime (87020429) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17122 + ... + 21614.

Almost surely, 2^87020424 is an apocalyptic number.

It is an amenable number.

87020424 is an abundant number, since it is smaller than the sum of its proper divisors (149588676).

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

87020424 is a wasteful number, since it uses less digits than its factorization.

87020424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4774 (or 4767 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 27.

The square root of 87020424 is about 9328.4738301611. The cubic root of 87020424 is about 443.1394336773.

The spelling of 87020424 in words is "eighty-seven million, twenty thousand, four hundred twenty-four".