638104698 has 48 divisors (see below), whose sum is σ = 1723715136. Its totient is φ = 165741120.

The previous prime is 638104697. The next prime is 638104729. The reversal of 638104698 is 896401836.

638104698 is a `hidden beast` number, since 638 + 1 + 0 + 4 + 6 + 9 + 8 = 666.

It is not an unprimeable number, because it can be changed into a prime (638104693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 228811 + ... + 231582.

It is an arithmetic number, because the mean of its divisors is an integer number (35910732).

Almost surely, 2^638104698 is an apocalyptic number.

638104698 is an abundant number, since it is smaller than the sum of its proper divisors (1085610438).

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

638104698 is a wasteful number, since it uses less digits than its factorization.

638104698 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 460419 (or 460416 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 45.

The square root of 638104698 is about 25260.7343123671. The cubic root of 638104698 is about 860.9223464711.

The spelling of 638104698 in words is "six hundred thirty-eight million, one hundred four thousand, six hundred ninety-eight".