82790638 has 32 divisors (see below), whose sum is σ = 149932800. Its totient is φ = 33493824.

The previous prime is 82790569. The next prime is 82790651. The reversal of 82790638 is 83609728.

It is a junction number, because it is equal to n+sod(n) for n = 82790594 and 82790603.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 145218 + ... + 145786.

It is an arithmetic number, because the mean of its divisors is an integer number (4685400).

Almost surely, 2^82790638 is an apocalyptic number.

82790638 is a deficient number, since it is larger than the sum of its proper divisors (67142162).

82790638 is a wasteful number, since it uses less digits than its factorization.

82790638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1144.

The product of its (nonzero) digits is 145152, while the sum is 43.

The square root of 82790638 is about 9098.9360916538. The cubic root of 82790638 is about 435.8399905229.

The spelling of 82790638 in words is "eighty-two million, seven hundred ninety thousand, six hundred thirty-eight".