3139388928 has 280 divisors, whose sum is σ = 10143757008. Its totient is φ = 964472832.

The previous prime is 3139388927. The next prime is 3139388947. The reversal of 3139388928 is 8298839313.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3139388921) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 4851901 + ... + 4852547.

Almost surely, 2^3139388928 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3139388928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5071878504).

3139388928 is an abundant number, since it is smaller than the sum of its proper divisors (7004368080).

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

3139388928 is an frugal number, since it uses more digits than its factorization.

3139388928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 696 (or 665 counting only the distinct ones).

The product of its digits is 2239488, while the sum is 54.

The square root of 3139388928 is about 56030.2501154510. The cubic root of 3139388928 is about 1464.2493528509.

The spelling of 3139388928 in words is "three billion, one hundred thirty-nine million, three hundred eighty-eight thousand, nine hundred twenty-eight".