87718990 has 16 divisors (see below), whose sum is σ = 160058448. Its totient is φ = 34606656.

The previous prime is 87718973. The next prime is 87718999. The reversal of 87718990 is 9981778.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87718999) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59352 + ... + 60811.

It is an arithmetic number, because the mean of its divisors is an integer number (10003653).

Almost surely, 2^87718990 is an apocalyptic number.

87718990 is a deficient number, since it is larger than the sum of its proper divisors (72339458).

87718990 is a wasteful number, since it uses less digits than its factorization.

87718990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120243.

The product of its (nonzero) digits is 254016, while the sum is 49.

The square root of 87718990 is about 9365.8416599898. The cubic root of 87718990 is about 444.3220582230.

The spelling of 87718990 in words is "eighty-seven million, seven hundred eighteen thousand, nine hundred ninety".