87793690 has 12 divisors (see below), whose sum is σ = 158081994. Its totient is φ = 35105624.

The previous prime is 87793687. The next prime is 87793709. The reversal of 87793690 is 9639778.

It can be written as a sum of positive squares in only one way, i.e., 79014321 + 8779369 = 8889^2 + 2963^2 .

It is a super-2 number, since 2×87793690² = 15415464007632200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 28149 + ... + 31111.

Almost surely, 2^87793690 is an apocalyptic number.

87793690 is a deficient number, since it is larger than the sum of its proper divisors (70288304).

87793690 is an frugal number, since it uses more digits than its factorization.

87793690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5933 (or 2970 counting only the distinct ones).

The product of its (nonzero) digits is 571536, while the sum is 49.

The square root of 87793690 is about 9369.8287070789. The cubic root of 87793690 is about 444.4481481404.

The spelling of 87793690 in words is "eighty-seven million, seven hundred ninety-three thousand, six hundred ninety".