71765990 has 16 divisors (see below), whose sum is σ = 132330240. Its totient is φ = 28006080.

The previous prime is 71765989. The next prime is 71766043. The reversal of 71765990 is 9956717.

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, 87110 + ... + 87929.

It is an arithmetic number, because the mean of its divisors is an integer number (8270640).

Almost surely, 2^71765990 is an apocalyptic number.

71765990 is a deficient number, since it is larger than the sum of its proper divisors (60564250).

71765990 is a wasteful number, since it uses less digits than its factorization.

71765990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175087.

The product of its (nonzero) digits is 119070, while the sum is 44.

The square root of 71765990 is about 8471.4809803245. The cubic root of 71765990 is about 415.5655713548.

The spelling of 71765990 in words is "seventy-one million, seven hundred sixty-five thousand, nine hundred ninety".