87090386 has 4 divisors (see below), whose sum is σ = 130635582. Its totient is φ = 43545192.

The previous prime is 87090379. The next prime is 87090391. The reversal of 87090386 is 68309078.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 75359761 + 11730625 = 8681^2 + 3425^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21772595 + ... + 21772598.

Almost surely, 2^87090386 is an apocalyptic number.

87090386 is a deficient number, since it is larger than the sum of its proper divisors (43545196).

87090386 is a wasteful number, since it uses less digits than its factorization.

87090386 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43545195.

The product of its (nonzero) digits is 72576, while the sum is 41.

The square root of 87090386 is about 9332.2229934780. Note that the first 3 decimals coincide. The cubic root of 87090386 is about 443.2581591245.

The spelling of 87090386 in words is "eighty-seven million, ninety thousand, three hundred eighty-six".