3157981930 has 8 divisors (see below), whose sum is σ = 5684367492. Its totient is φ = 1263192768.

The previous prime is 3157981919. The next prime is 3157981943. The reversal of 3157981930 is 391897513.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 3107728009 + 50253921 = 55747^2 + 7089^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 157899087 + ... + 157899106.

Almost surely, 2^3157981930 is an apocalyptic number.

3157981930 is a deficient number, since it is larger than the sum of its proper divisors (2526385562).

3157981930 is a wasteful number, since it uses less digits than its factorization.

3157981930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315798200.

The product of its (nonzero) digits is 204120, while the sum is 46.

The square root of 3157981930 is about 56195.9244963547. The cubic root of 3157981930 is about 1467.1343326694.

The spelling of 3157981930 in words is "three billion, one hundred fifty-seven million, nine hundred eighty-one thousand, nine hundred thirty".