71572770 has 24 divisors (see below), whose sum is σ = 186089436. Its totient is φ = 19086048.

The previous prime is 71572759. The next prime is 71572789. The reversal of 71572770 is 7727517.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 70610409 + 962361 = 8403^2 + 981^2 .

It is a super-2 number, since 2×71572770² = 10245322810945800, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 397537 + ... + 397716.

Almost surely, 2^71572770 is an apocalyptic number.

71572770 is an abundant number, since it is smaller than the sum of its proper divisors (114516666).

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

71572770 is a wasteful number, since it uses less digits than its factorization.

71572770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 795266 (or 795263 counting only the distinct ones).

The product of its (nonzero) digits is 24010, while the sum is 36.

The square root of 71572770 is about 8460.0691486536. The cubic root of 71572770 is about 415.1922852098.

The spelling of 71572770 in words is "seventy-one million, five hundred seventy-two thousand, seven hundred seventy".