1890400912 has 40 divisors (see below), whose sum is σ = 3903250176. Its totient is φ = 884860416.

The previous prime is 1890400891. The next prime is 1890400943. The reversal of 1890400912 is 2190040981.

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, 37353 + ... + 71944.

Almost surely, 2^1890400912 is an apocalyptic number.

It is an amenable number.

1890400912 is an abundant number, since it is smaller than the sum of its proper divisors (2012849264).

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

1890400912 is a wasteful number, since it uses less digits than its factorization.

1890400912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109375 (or 109369 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 34.

The square root of 1890400912 is about 43478.7409201325. The cubic root of 1890400912 is about 1236.4730055996.

The spelling of 1890400912 in words is "one billion, eight hundred ninety million, four hundred thousand, nine hundred twelve".