87220688 has 10 divisors (see below), whose sum is σ = 168990114. Its totient is φ = 43610336.

The previous prime is 87220663. The next prime is 87220699. The reversal of 87220688 is 88602278.

It can be written as a sum of positive squares in only one way, i.e., 55771024 + 31449664 = 7468^2 + 5608^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2725631 + ... + 2725662.

Almost surely, 2^87220688 is an apocalyptic number.

It is an amenable number.

87220688 is a deficient number, since it is larger than the sum of its proper divisors (81769426).

87220688 is a wasteful number, since it uses less digits than its factorization.

87220688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5451301 (or 5451295 counting only the distinct ones).

The product of its (nonzero) digits is 86016, while the sum is 41.

The square root of 87220688 is about 9339.2016789445. The cubic root of 87220688 is about 443.4791121147.

The spelling of 87220688 in words is "eighty-seven million, two hundred twenty thousand, six hundred eighty-eight".