71912990 has 8 divisors (see below), whose sum is σ = 129443400. Its totient is φ = 28765192.

The previous prime is 71912983. The next prime is 71913007. The reversal of 71912990 is 9921917.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3595640 + ... + 3595659.

It is an arithmetic number, because the mean of its divisors is an integer number (16180425).

Almost surely, 2^71912990 is an apocalyptic number.

71912990 is a deficient number, since it is larger than the sum of its proper divisors (57530410).

71912990 is a wasteful number, since it uses less digits than its factorization.

71912990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7191306.

The product of its (nonzero) digits is 10206, while the sum is 38.

The square root of 71912990 is about 8480.1527108891. The cubic root of 71912990 is about 415.8491154911.

The spelling of 71912990 in words is "seventy-one million, nine hundred twelve thousand, nine hundred ninety".