16139828 has 6 divisors (see below), whose sum is σ = 28244706. Its totient is φ = 8069912.

The previous prime is 16139821. The next prime is 16139839. The reversal of 16139828 is 82893161.

16139828 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 12306064 + 3833764 = 3508^2 + 1958^2 .

It is a junction number, because it is equal to n+sod(n) for n = 16139791 and 16139800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16139821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2017475 + ... + 2017482.

It is an arithmetic number, because the mean of its divisors is an integer number (4707451).

Almost surely, 2^16139828 is an apocalyptic number.

It is an amenable number.

16139828 is a deficient number, since it is larger than the sum of its proper divisors (12104878).

16139828 is a wasteful number, since it uses less digits than its factorization.

16139828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4034961 (or 4034959 counting only the distinct ones).

The product of its digits is 20736, while the sum is 38.

The square root of 16139828 is about 4017.4404787128. The cubic root of 16139828 is about 252.7161329515.

The spelling of 16139828 in words is "sixteen million, one hundred thirty-nine thousand, eight hundred twenty-eight".