3139947720 has 512 divisors, whose sum is σ = 13199155200. Its totient is φ = 646216704.

The previous prime is 3139947703. The next prime is 3139947743. The reversal of 3139947720 is 277499313.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 4225669 + ... + 4226411.

It is an arithmetic number, because the mean of its divisors is an integer number (25779600).

Almost surely, 2^3139947720 is an apocalyptic number.

3139947720 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3139947720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6599577600).

3139947720 is an abundant number, since it is smaller than the sum of its proper divisors (10059207480).

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

3139947720 is a wasteful number, since it uses less digits than its factorization.

3139947720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 826 (or 816 counting only the distinct ones).

The product of its (nonzero) digits is 285768, while the sum is 45.

The square root of 3139947720 is about 56035.2364142421. The cubic root of 3139947720 is about 1464.3362235023.

The spelling of 3139947720 in words is "three billion, one hundred thirty-nine million, nine hundred forty-seven thousand, seven hundred twenty".