82639450 has 12 divisors (see below), whose sum is σ = 153709470. Its totient is φ = 33055760.

The previous prime is 82639433. The next prime is 82639511. The reversal of 82639450 is 5493628.

It can be written as a sum of positive squares in 3 ways, for example, as 72948681 + 9690769 = 8541^2 + 3113^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 826345 + ... + 826444.

Almost surely, 2^82639450 is an apocalyptic number.

82639450 is a deficient number, since it is larger than the sum of its proper divisors (71070020).

82639450 is a wasteful number, since it uses less digits than its factorization.

82639450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1652801 (or 1652796 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 37.

The square root of 82639450 is about 9090.6242909934. The cubic root of 82639450 is about 435.5745260154.

The spelling of 82639450 in words is "eighty-two million, six hundred thirty-nine thousand, four hundred fifty".