3145856172 has 24 divisors (see below), whose sum is σ = 7342551216. Its totient is φ = 1048301568.

The previous prime is 3145856117. The next prime is 3145856177. The reversal of 3145856172 is 2716585413.

It is a happy number.

It is a super-2 number, since 2×3145856172² = 19792822109820987168, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (3145856177) 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 7 ways as a sum of consecutive naturals, for example, 3568 + ... + 79400.

It is an arithmetic number, because the mean of its divisors is an integer number (305939634).

Almost surely, 2^3145856172 is an apocalyptic number.

It is an amenable number.

3145856172 is an abundant number, since it is smaller than the sum of its proper divisors (4196695044).

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

3145856172 is a wasteful number, since it uses less digits than its factorization.

3145856172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79297 (or 79295 counting only the distinct ones).

The product of its digits is 201600, while the sum is 42.

The square root of 3145856172 is about 56087.9324988896. The cubic root of 3145856172 is about 1465.2541304142.

The spelling of 3145856172 in words is "three billion, one hundred forty-five million, eight hundred fifty-six thousand, one hundred seventy-two".