71920404 has 36 divisors (see below), whose sum is σ = 192494484. Its totient is φ = 22563072.

The previous prime is 71920367. The next prime is 71920411. The reversal of 71920404 is 40402917.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 32832900 + 39087504 = 5730^2 + 6252^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 58147 + ... + 59370.

It is an arithmetic number, because the mean of its divisors is an integer number (5347069).

Almost surely, 2^71920404 is an apocalyptic number.

It is an amenable number.

71920404 is an abundant number, since it is smaller than the sum of its proper divisors (120574080).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

71920404 is a wasteful number, since it uses less digits than its factorization.

71920404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117544 (or 117539 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 71920404 is about 8480.5898379771. The cubic root of 71920404 is about 415.8634059060.

The spelling of 71920404 in words is "seventy-one million, nine hundred twenty thousand, four hundred four".