71916772 has 6 divisors (see below), whose sum is σ = 125854358. Its totient is φ = 35958384.

The previous prime is 71916739. The next prime is 71916797. The reversal of 71916772 is 27761917.

It can be written as a sum of positive squares in only one way, i.e., 61842496 + 10074276 = 7864^2 + 3174^2 .

It is a super-3 number, since 3×71916772³ (a number of 25 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8989593 + ... + 8989600.

Almost surely, 2^71916772 is an apocalyptic number.

It is an amenable number.

71916772 is a deficient number, since it is larger than the sum of its proper divisors (53937586).

71916772 is a wasteful number, since it uses less digits than its factorization.

71916772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17979197 (or 17979195 counting only the distinct ones).

The product of its digits is 37044, while the sum is 40.

The square root of 71916772 is about 8480.3756992247. The cubic root of 71916772 is about 415.8564053831.

The spelling of 71916772 in words is "seventy-one million, nine hundred sixteen thousand, seven hundred seventy-two".