71842772 has 24 divisors (see below), whose sum is σ = 129313800. Its totient is φ = 34909056.

The previous prime is 71842769. The next prime is 71842787. The reversal of 71842772 is 27724817.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 12645136 + 59197636 = 3556^2 + 7694^2 .

It is a super-2 number, since 2×71842772² = 10322767777287968, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21554 + ... + 24662.

It is an arithmetic number, because the mean of its divisors is an integer number (5388075).

Almost surely, 2^71842772 is an apocalyptic number.

It is an amenable number.

71842772 is a deficient number, since it is larger than the sum of its proper divisors (57471028).

71842772 is a wasteful number, since it uses less digits than its factorization.

71842772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3275 (or 3273 counting only the distinct ones).

The product of its digits is 43904, while the sum is 38.

The square root of 71842772 is about 8476.0115620497. The cubic root of 71842772 is about 415.7137222319.

The spelling of 71842772 in words is "seventy-one million, eight hundred forty-two thousand, seven hundred seventy-two".