82507690 has 32 divisors (see below), whose sum is σ = 157101120. Its totient is φ = 31112064.

The previous prime is 82507673. The next prime is 82507699. The reversal of 82507690 is 9670528.

It is a super-2 number, since 2×82507690² = 13615037818272200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (82507699) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42174 + ... + 44086.

It is an arithmetic number, because the mean of its divisors is an integer number (4909410).

Almost surely, 2^82507690 is an apocalyptic number.

82507690 is a deficient number, since it is larger than the sum of its proper divisors (74593430).

82507690 is a wasteful number, since it uses less digits than its factorization.

82507690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2166.

The product of its (nonzero) digits is 30240, while the sum is 37.

The square root of 82507690 is about 9083.3743729960. The cubic root of 82507690 is about 435.3429101302.

The spelling of 82507690 in words is "eighty-two million, five hundred seven thousand, six hundred ninety".