87704220 has 48 divisors (see below), whose sum is σ = 248693760. Its totient is φ = 23090496.

The previous prime is 87704189. The next prime is 87704233. The reversal of 87704220 is 2240778.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4512 + ... + 13991.

It is an arithmetic number, because the mean of its divisors is an integer number (5181120).

Almost surely, 2^87704220 is an apocalyptic number.

It is an amenable number.

87704220 is an abundant number, since it is smaller than the sum of its proper divisors (160989540).

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

87704220 is a wasteful number, since it uses less digits than its factorization.

87704220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18594 (or 18592 counting only the distinct ones).

The product of its (nonzero) digits is 6272, while the sum is 30.

The square root of 87704220 is about 9365.0531231809. The cubic root of 87704220 is about 444.2971187157.

Adding to 87704220 its reverse (2240778), we get a palindrome (89944998).

The spelling of 87704220 in words is "eighty-seven million, seven hundred four thousand, two hundred twenty".