3931542820 has 12 divisors (see below), whose sum is σ = 8256239964. Its totient is φ = 1572617120.

The previous prime is 3931542817. The next prime is 3931542829. The reversal of 3931542820 is 282451393.

It can be written as a sum of positive squares in 2 ways, for example, as 2795448384 + 1136094436 = 52872^2 + 33706^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 3931542820.

It is not an unprimeable number, because it can be changed into a prime (3931542829) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 98288551 + ... + 98288590.

It is an arithmetic number, because the mean of its divisors is an integer number (688019997).

Almost surely, 2^3931542820 is an apocalyptic number.

It is an amenable number.

3931542820 is an abundant number, since it is smaller than the sum of its proper divisors (4324697144).

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

3931542820 is a wasteful number, since it uses less digits than its factorization.

3931542820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196577150 (or 196577148 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 37.

The square root of 3931542820 is about 62702.0160760402. The cubic root of 3931542820 is about 1578.2931442159.

The spelling of 3931542820 in words is "three billion, nine hundred thirty-one million, five hundred forty-two thousand, eight hundred twenty".