71953990 has 16 divisors (see below), whose sum is σ = 131158080. Its totient is φ = 28416960.

The previous prime is 71953967. The next prime is 71954041. The reversal of 71953990 is 9935917.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44751 + ... + 46330.

It is an arithmetic number, because the mean of its divisors is an integer number (8197380).

Almost surely, 2^71953990 is an apocalyptic number.

71953990 is a deficient number, since it is larger than the sum of its proper divisors (59204090).

71953990 is a wasteful number, since it uses less digits than its factorization.

71953990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91167.

The product of its (nonzero) digits is 76545, while the sum is 43.

The square root of 71953990 is about 8482.5697757224. The cubic root of 71953990 is about 415.9281303049.

The spelling of 71953990 in words is "seventy-one million, nine hundred fifty-three thousand, nine hundred ninety".