71192990 has 16 divisors (see below), whose sum is σ = 139797360. Its totient is φ = 25888320.

The previous prime is 71192987. The next prime is 71193029. The reversal of 71192990 is 9929117.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 323495 + ... + 323714.

It is an arithmetic number, because the mean of its divisors is an integer number (8737335).

Almost surely, 2^71192990 is an apocalyptic number.

71192990 is a deficient number, since it is larger than the sum of its proper divisors (68604370).

71192990 is a wasteful number, since it uses less digits than its factorization.

71192990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 647227.

The product of its (nonzero) digits is 10206, while the sum is 38.

The square root of 71192990 is about 8437.5938513299. The cubic root of 71192990 is about 414.4566169358.

The spelling of 71192990 in words is "seventy-one million, one hundred ninety-two thousand, nine hundred ninety".