1904987940 has 24 divisors (see below), whose sum is σ = 5333966400. Its totient is φ = 507996768.

The previous prime is 1904987933. The next prime is 1904987993. The reversal of 1904987940 is 497894091.

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, 15874840 + ... + 15874959.

It is an arithmetic number, because the mean of its divisors is an integer number (222248600).

Almost surely, 2^1904987940 is an apocalyptic number.

1904987940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1904987940 is an abundant number, since it is smaller than the sum of its proper divisors (3428978460).

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

1904987940 is a wasteful number, since it uses less digits than its factorization.

1904987940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31749811 (or 31749809 counting only the distinct ones).

The product of its (nonzero) digits is 653184, while the sum is 51.

The square root of 1904987940 is about 43646.1675293490. The cubic root of 1904987940 is about 1239.6452202162.

The spelling of 1904987940 in words is "one billion, nine hundred four million, nine hundred eighty-seven thousand, nine hundred forty".