71920770 has 32 divisors (see below), whose sum is σ = 180116352. Its totient is φ = 18344832.

The previous prime is 71920759. The next prime is 71920777. The reversal of 71920770 is 7702917.

It is not an unprimeable number, because it can be changed into a prime (71920777) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51427 + ... + 52806.

It is an arithmetic number, because the mean of its divisors is an integer number (5628636).

Almost surely, 2^71920770 is an apocalyptic number.

71920770 is an abundant number, since it is smaller than the sum of its proper divisors (108195582).

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

71920770 is a wasteful number, since it uses less digits than its factorization.

71920770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104266.

The product of its (nonzero) digits is 6174, while the sum is 33.

The square root of 71920770 is about 8480.6114166374. The cubic root of 71920770 is about 415.8641113422.

The spelling of 71920770 in words is "seventy-one million, nine hundred twenty thousand, seven hundred seventy".