638046834 has 16 divisors (see below), whose sum is σ = 1276347072. Its totient is φ = 212640048.

The previous prime is 638046823. The next prime is 638046853. The reversal of 638046834 is 438640836.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43347 + ... + 56169.

It is an arithmetic number, because the mean of its divisors is an integer number (79771692).

Almost surely, 2^638046834 is an apocalyptic number.

638046834 is an abundant number, since it is smaller than the sum of its proper divisors (638300238).

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

638046834 is a wasteful number, since it uses less digits than its factorization.

638046834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21121.

The product of its (nonzero) digits is 331776, while the sum is 42.

The square root of 638046834 is about 25259.5889515249. The cubic root of 638046834 is about 860.8963225721.

The spelling of 638046834 in words is "six hundred thirty-eight million, forty-six thousand, eight hundred thirty-four".