1639728102 has 16 divisors (see below), whose sum is σ = 3325646592. Its totient is φ = 538877640.

The previous prime is 1639728067. The next prime is 1639728107. The reversal of 1639728102 is 2018279361.

1639728102 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1639728107) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1924138 + ... + 1924989.

It is an arithmetic number, because the mean of its divisors is an integer number (207852912).

Almost surely, 2^1639728102 is an apocalyptic number.

1639728102 is an abundant number, since it is smaller than the sum of its proper divisors (1685918490).

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

1639728102 is a wasteful number, since it uses less digits than its factorization.

1639728102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3849203.

The product of its (nonzero) digits is 36288, while the sum is 39.

The square root of 1639728102 is about 40493.5563022069. The cubic root of 1639728102 is about 1179.2085332209.

The spelling of 1639728102 in words is "one billion, six hundred thirty-nine million, seven hundred twenty-eight thousand, one hundred two".