71912380 has 24 divisors (see below), whose sum is σ = 159900048. Its totient is φ = 27072768.

The previous prime is 71912369. The next prime is 71912381. The reversal of 71912380 is 8321917.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71912381) by changing a digit.

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, 105414 + ... + 106093.

It is an arithmetic number, because the mean of its divisors is an integer number (6662502).

Almost surely, 2^71912380 is an apocalyptic number.

It is an amenable number.

71912380 is an abundant number, since it is smaller than the sum of its proper divisors (87987668).

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

71912380 is a wasteful number, since it uses less digits than its factorization.

71912380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211533 (or 211531 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 31.

The square root of 71912380 is about 8480.1167444794. The cubic root of 71912380 is about 415.8479396782.

The spelling of 71912380 in words is "seventy-one million, nine hundred twelve thousand, three hundred eighty".