638092494 has 24 divisors (see below), whose sum is σ = 1488883032. Its totient is φ = 196336080.

The previous prime is 638092487. The next prime is 638092573. The reversal of 638092494 is 494290836.

638092494 is a `hidden beast` number, since 638 + 0 + 9 + 2 + 4 + 9 + 4 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1363212 + ... + 1363679.

It is an arithmetic number, because the mean of its divisors is an integer number (62036793).

Almost surely, 2^638092494 is an apocalyptic number.

638092494 is an abundant number, since it is smaller than the sum of its proper divisors (850790538).

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

638092494 is a wasteful number, since it uses less digits than its factorization.

638092494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2726912 (or 2726909 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 45.

The square root of 638092494 is about 25260.4927505383. The cubic root of 638092494 is about 860.9168579447.

The spelling of 638092494 in words is "six hundred thirty-eight million, ninety-two thousand, four hundred ninety-four".