1638812098 has 32 divisors (see below), whose sum is σ = 3170482560. Its totient is φ = 616479360.

The previous prime is 1638812081. The next prime is 1638812101. The reversal of 1638812098 is 8902188361.

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, 179011 + ... + 187942.

It is an arithmetic number, because the mean of its divisors is an integer number (99077580).

Almost surely, 2^1638812098 is an apocalyptic number.

1638812098 is a deficient number, since it is larger than the sum of its proper divisors (1531670462).

1638812098 is a wasteful number, since it uses less digits than its factorization.

1638812098 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 367002.

The product of its (nonzero) digits is 165888, while the sum is 46.

The square root of 1638812098 is about 40482.2442312676. The cubic root of 1638812098 is about 1178.9889112540.

The spelling of 1638812098 in words is "one billion, six hundred thirty-eight million, eight hundred twelve thousand, ninety-eight".