618671904 has 48 divisors (see below), whose sum is σ = 1658579328. Its totient is φ = 201834752.

The previous prime is 618671899. The next prime is 618671927. The reversal of 618671904 is 409176816.

It is a tau number, because it is divible by the number of its divisors (48).

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 7 ways as a sum of consecutive naturals, for example, 64047 + ... + 73070.

It is an arithmetic number, because the mean of its divisors is an integer number (34553736).

Almost surely, 2^618671904 is an apocalyptic number.

It is an amenable number.

618671904 is an abundant number, since it is smaller than the sum of its proper divisors (1039907424).

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

618671904 is a wasteful number, since it uses less digits than its factorization.

618671904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137177 (or 137169 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 42.

The square root of 618671904 is about 24873.1160894649. The cubic root of 618671904 is about 852.0926082412.

The spelling of 618671904 in words is "six hundred eighteen million, six hundred seventy-one thousand, nine hundred four".