71808942 has 16 divisors (see below), whose sum is σ = 151176960. Its totient is φ = 22676472.

The previous prime is 71808941. The next prime is 71808943. The reversal of 71808942 is 24980817.

It is an interprime number because it is at equal distance from previous prime (71808941) and next prime (71808943).

It is a self number, because there is not a number n which added to its sum of digits gives 71808942.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71808941) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 314838 + ... + 315065.

It is an arithmetic number, because the mean of its divisors is an integer number (9448560).

Almost surely, 2^71808942 is an apocalyptic number.

71808942 is an abundant number, since it is smaller than the sum of its proper divisors (79368018).

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

71808942 is a wasteful number, since it uses less digits than its factorization.

71808942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 629927.

The product of its (nonzero) digits is 32256, while the sum is 39.

The square root of 71808942 is about 8474.0156950527. The cubic root of 71808942 is about 415.6484602583.

The spelling of 71808942 in words is "seventy-one million, eight hundred eight thousand, nine hundred forty-two".