3638870794 has 8 divisors (see below), whose sum is σ = 5878175940. Its totient is φ = 1679478816.

The previous prime is 3638870789. The next prime is 3638870803. The reversal of 3638870794 is 4970788363.

It can be written as a sum of positive squares in 2 ways, for example, as 3564687025 + 74183769 = 59705^2 + 8613^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69978259 + ... + 69978310.

Almost surely, 2^3638870794 is an apocalyptic number.

3638870794 is a deficient number, since it is larger than the sum of its proper divisors (2239305146).

3638870794 is a wasteful number, since it uses less digits than its factorization.

3638870794 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139956584.

The product of its (nonzero) digits is 6096384, while the sum is 55.

The square root of 3638870794 is about 60323.0535865021. The cubic root of 3638870794 is about 1538.1152511905.

The spelling of 3638870794 in words is "three billion, six hundred thirty-eight million, eight hundred seventy thousand, seven hundred ninety-four".