71939814 has 32 divisors (see below), whose sum is σ = 158042880. Its totient is φ = 21729312.

The previous prime is 71939797. The next prime is 71939831. The reversal of 71939814 is 41893917.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (71939797) and next prime (71939831).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11097 + ... + 16340.

It is an arithmetic number, because the mean of its divisors is an integer number (4938840).

Almost surely, 2^71939814 is an apocalyptic number.

71939814 is an abundant number, since it is smaller than the sum of its proper divisors (86103066).

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

71939814 is a wasteful number, since it uses less digits than its factorization.

71939814 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27484.

The product of its digits is 54432, while the sum is 42.

The square root of 71939814 is about 8481.7341387242. The cubic root of 71939814 is about 415.9008138469.

The spelling of 71939814 in words is "seventy-one million, nine hundred thirty-nine thousand, eight hundred fourteen".