3665027638 has 32 divisors (see below), whose sum is σ = 5824143360. Its totient is φ = 1726920000.

The previous prime is 3665027633. The next prime is 3665027651. The reversal of 3665027638 is 8367205663.

It is a Smith number, since the sum of its digits (46) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3665027633) 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, 1877563 + ... + 1879513.

It is an arithmetic number, because the mean of its divisors is an integer number (182004480).

Almost surely, 2^3665027638 is an apocalyptic number.

3665027638 is a deficient number, since it is larger than the sum of its proper divisors (2159115722).

3665027638 is a wasteful number, since it uses less digits than its factorization.

3665027638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2764.

The product of its (nonzero) digits is 1088640, while the sum is 46.

The square root of 3665027638 is about 60539.4717353893. The cubic root of 3665027638 is about 1541.7918702361.

The spelling of 3665027638 in words is "three billion, six hundred sixty-five million, twenty-seven thousand, six hundred thirty-eight".