82513890 has 40 divisors (see below), whose sum is σ = 221872860. Its totient is φ = 22003488.

The previous prime is 82513889. The next prime is 82513891. The reversal of 82513890 is 9831528.

It is an interprime number because it is at equal distance from previous prime (82513889) and next prime (82513891).

It can be written as a sum of positive squares in 2 ways, for example, as 78907689 + 3606201 = 8883^2 + 1899^2 .

It is not an unprimeable number, because it can be changed into a prime (82513891) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 50125 + ... + 51744.

Almost surely, 2^82513890 is an apocalyptic number.

82513890 is an abundant number, since it is smaller than the sum of its proper divisors (139358970).

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

82513890 is a wasteful number, since it uses less digits than its factorization.

82513890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101888 (or 101879 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The square root of 82513890 is about 9083.7156494465. The cubic root of 82513890 is about 435.3538144004.

The spelling of 82513890 in words is "eighty-two million, five hundred thirteen thousand, eight hundred ninety".