71424724 has 24 divisors (see below), whose sum is σ = 150368960. Its totient is φ = 28999296.

The previous prime is 71424721. The next prime is 71424739. The reversal of 71424724 is 42742417.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71424721) 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, 66597 + ... + 67660.

Almost surely, 2^71424724 is an apocalyptic number.

It is an amenable number.

71424724 is an abundant number, since it is smaller than the sum of its proper divisors (78944236).

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

71424724 is a wasteful number, since it uses less digits than its factorization.

71424724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134287 (or 134285 counting only the distinct ones).

The product of its digits is 12544, while the sum is 31.

The square root of 71424724 is about 8451.3149272761. The cubic root of 71424724 is about 414.9058169200.

The spelling of 71424724 in words is "seventy-one million, four hundred twenty-four thousand, seven hundred twenty-four".