3156390720 has 224 divisors, whose sum is σ = 12726009600. Its totient is φ = 721446912.

The previous prime is 3156390683. The next prime is 3156390773. The reversal of 3156390720 is 270936513.

3156390720 is a `hidden beast` number, since 3 + 1 + 563 + 90 + 7 + 2 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (224).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 34386 + ... + 86574.

Almost surely, 2^3156390720 is an apocalyptic number.

3156390720 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 3156390720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6363004800).

3156390720 is an abundant number, since it is smaller than the sum of its proper divisors (9569618880).

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

3156390720 is a wasteful number, since it uses less digits than its factorization.

3156390720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52222 (or 52206 counting only the distinct ones).

The product of its (nonzero) digits is 34020, while the sum is 36.

The square root of 3156390720 is about 56181.7650132140. The cubic root of 3156390720 is about 1466.8878766435.

The spelling of 3156390720 in words is "three billion, one hundred fifty-six million, three hundred ninety thousand, seven hundred twenty".