3638446240 has 96 divisors (see below), whose sum is σ = 10098660096. Its totient is φ = 1221288960.

The previous prime is 3638446219. The next prime is 3638446243. The reversal of 3638446240 is 426448363.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 3638446193 and 3638446202.

It is not an unprimeable number, because it can be changed into a prime (3638446243) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56632 + ... + 102391.

It is an arithmetic number, because the mean of its divisors is an integer number (105194376).

Almost surely, 2^3638446240 is an apocalyptic number.

It is an amenable number.

3638446240 is an abundant number, since it is smaller than the sum of its proper divisors (6460213856).

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

3638446240 is a wasteful number, since it uses less digits than its factorization.

3638446240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159062 (or 159054 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 40.

The square root of 3638446240 is about 60319.5344809623. The cubic root of 3638446240 is about 1538.0554305834.

The spelling of 3638446240 in words is "three billion, six hundred thirty-eight million, four hundred forty-six thousand, two hundred forty".