3131420428 has 12 divisors (see below), whose sum is σ = 5613644232. Its totient is φ = 1527522080.

The previous prime is 3131420393. The next prime is 3131420429. The reversal of 3131420428 is 8240241313.

It is a junction number, because it is equal to n+sod(n) for n = 3131420396 and 3131420405.

It is not an unprimeable number, because it can be changed into a prime (3131420429) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 9546850 + ... + 9547177.

It is an arithmetic number, because the mean of its divisors is an integer number (467803686).

Almost surely, 2^3131420428 is an apocalyptic number.

It is an amenable number.

3131420428 is a deficient number, since it is larger than the sum of its proper divisors (2482223804).

3131420428 is a wasteful number, since it uses less digits than its factorization.

3131420428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19094072 (or 19094070 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 3131420428 is about 55959.0960255793. The cubic root of 3131420428 is about 1463.0094346052.

The spelling of 3131420428 in words is "three billion, one hundred thirty-one million, four hundred twenty thousand, four hundred twenty-eight".