82520739 has 48 divisors (see below), whose sum is σ = 140437440. Its totient is φ = 45722880.

The previous prime is 82520731. The next prime is 82520749. The reversal of 82520739 is 93702528.

It is a happy number.

It is not a de Polignac number, because 82520739 - 2³ = 82520731 is a prime.

It is a super-2 number, since 2×82520739² = 13619344730212242, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (82520731) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 418789 + ... + 418985.

It is an arithmetic number, because the mean of its divisors is an integer number (2925780).

Almost surely, 2^82520739 is an apocalyptic number.

82520739 is a deficient number, since it is larger than the sum of its proper divisors (57916701).

82520739 is a wasteful number, since it uses less digits than its factorization.

82520739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 380 (or 377 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 82520739 is about 9084.0926349306. The cubic root of 82520739 is about 435.3658594665.

The spelling of 82520739 in words is "eighty-two million, five hundred twenty thousand, seven hundred thirty-nine".