1971872904 has 32 divisors (see below), whose sum is σ = 4965156000. Its totient is φ = 652561152.

The previous prime is 1971872867. The next prime is 1971872963. The reversal of 1971872904 is 4092781791.

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, 292209 + ... + 298880.

It is an arithmetic number, because the mean of its divisors is an integer number (155161125).

Almost surely, 2^1971872904 is an apocalyptic number.

It is an amenable number.

1971872904 is an abundant number, since it is smaller than the sum of its proper divisors (2993283096).

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

1971872904 is a wasteful number, since it uses less digits than its factorization.

1971872904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 591237 (or 591233 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 48.

The square root of 1971872904 is about 44405.7755703017. The cubic root of 1971872904 is about 1253.9868235250.

The spelling of 1971872904 in words is "one billion, nine hundred seventy-one million, eight hundred seventy-two thousand, nine hundred four".