87020844 has 48 divisors (see below), whose sum is σ = 210739200. Its totient is φ = 27918720.

The previous prime is 87020839. The next prime is 87020849. The reversal of 87020844 is 44802078.

It is an interprime number because it is at equal distance from previous prime (87020839) and next prime (87020849).

It is not an unprimeable number, because it can be changed into a prime (87020849) 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, 82432 + ... + 83480.

It is an arithmetic number, because the mean of its divisors is an integer number (4390400).

Almost surely, 2^87020844 is an apocalyptic number.

It is an amenable number.

87020844 is an abundant number, since it is smaller than the sum of its proper divisors (123718356).

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

87020844 is a wasteful number, since it uses less digits than its factorization.

87020844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1310 (or 1308 counting only the distinct ones).

The product of its (nonzero) digits is 14336, while the sum is 33.

The square root of 87020844 is about 9328.4963418549. The cubic root of 87020844 is about 443.1401466067.

The spelling of 87020844 in words is "eighty-seven million, twenty thousand, eight hundred forty-four".