3638140488 has 128 divisors (see below), whose sum is σ = 10722067200. Its totient is φ = 1139069952.

The previous prime is 3638140459. The next prime is 3638140507. The reversal of 3638140488 is 8840418363.

3638140488 is a `hidden beast` number, since 3 + 638 + 1 + 4 + 0 + 4 + 8 + 8 = 666.

3638140488 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Cunningham number, because it is equal to 60317²-1.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3256506 + ... + 3257622.

It is an arithmetic number, because the mean of its divisors is an integer number (83766150).

Almost surely, 2^3638140488 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3638140488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5361033600).

3638140488 is an abundant number, since it is smaller than the sum of its proper divisors (7083926712).

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

3638140488 is a wasteful number, since it uses less digits than its factorization.

3638140488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2036 (or 2026 counting only the distinct ones).

The product of its (nonzero) digits is 442368, while the sum is 45.

The square root of 3638140488 is about 60316.9999917105. Note that the first 5 decimals coincide. The cubic root of 3638140488 is about 1538.0123465611.

The spelling of 3638140488 in words is "three billion, six hundred thirty-eight million, one hundred forty thousand, four hundred eighty-eight".