3638400002 has 16 divisors (see below), whose sum is σ = 5753521152. Its totient is φ = 1723056960.

The previous prime is 3638399981. The next prime is 3638400019. The reversal of 3638400002 is 2000048363.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 621383 + ... + 627210.

It is an arithmetic number, because the mean of its divisors is an integer number (359595072).

Almost surely, 2^3638400002 is an apocalyptic number.

3638400002 is a deficient number, since it is larger than the sum of its proper divisors (2115121150).

3638400002 is a wasteful number, since it uses less digits than its factorization.

3638400002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1248673.

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 3638400002 is about 60319.1512042403. The cubic root of 3638400002 is about 1538.0489152649.

Adding to 3638400002 its reverse (2000048363), we get a palindrome (5638448365).

The spelling of 3638400002 in words is "three billion, six hundred thirty-eight million, four hundred thousand, two".