1863140904 has 24 divisors (see below), whose sum is σ = 5046006810. Its totient is φ = 621046944.

The previous prime is 1863140897. The next prime is 1863140947. The reversal of 1863140904 is 4090413681.

1863140904 is a `hidden beast` number, since 18 + 631 + 4 + 0 + 9 + 0 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1831668804 + 31472100 = 42798^2 + 5610^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12938407 + ... + 12938550.

Almost surely, 2^1863140904 is an apocalyptic number.

It is an amenable number.

1863140904 is an abundant number, since it is smaller than the sum of its proper divisors (3182865906).

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

1863140904 is a wasteful number, since it uses less digits than its factorization.

1863140904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25876969 (or 25876962 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 1863140904 is about 43164.1159297859. The cubic root of 1863140904 is about 1230.5007994408.

The spelling of 1863140904 in words is "one billion, eight hundred sixty-three million, one hundred forty thousand, nine hundred four".