71941690 has 32 divisors (see below), whose sum is σ = 134129664. Its totient is φ = 27760320.

The previous prime is 71941687. The next prime is 71941691. The reversal of 71941690 is 9614917.

It is a super-2 number, since 2×71941690² = 10351213520112200, which contains 22 as substring.

It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is not an unprimeable number, because it can be changed into a prime (71941691) 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, 46225 + ... + 47755.

It is an arithmetic number, because the mean of its divisors is an integer number (4191552).

Almost surely, 2^71941690 is an apocalyptic number.

71941690 is a deficient number, since it is larger than the sum of its proper divisors (62187974).

71941690 is a wasteful number, since it uses less digits than its factorization.

71941690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1702.

The product of its (nonzero) digits is 13608, while the sum is 37.

The square root of 71941690 is about 8481.8447285953. The cubic root of 71941690 is about 415.9044290131.

The spelling of 71941690 in words is "seventy-one million, nine hundred forty-one thousand, six hundred ninety".