3638455388 has 12 divisors (see below), whose sum is σ = 6702417960. Its totient is φ = 1723478832.

The previous prime is 3638455357. The next prime is 3638455393. The reversal of 3638455388 is 8835548363.

It is a super-2 number, since 2×3638455388² = 26476715220932461088, which contains 22 as substring.

It is a congruent number.

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, 23937131 + ... + 23937282.

It is an arithmetic number, because the mean of its divisors is an integer number (558534830).

Almost surely, 2^3638455388 is an apocalyptic number.

3638455388 is a gapful number since it is divisible by the number (38) formed by its first and last digit.

It is an amenable number.

3638455388 is a deficient number, since it is larger than the sum of its proper divisors (3063962572).

3638455388 is a wasteful number, since it uses less digits than its factorization.

3638455388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47874436 (or 47874434 counting only the distinct ones).

The product of its digits is 8294400, while the sum is 53.

The square root of 3638455388 is about 60319.6103104123. The cubic root of 3638455388 is about 1538.0567196061.

The spelling of 3638455388 in words is "three billion, six hundred thirty-eight million, four hundred fifty-five thousand, three hundred eighty-eight".