3145556728 has 24 divisors (see below), whose sum is σ = 6165507600. Its totient is φ = 1504394672.

The previous prime is 3145556707. The next prime is 3145556737. The reversal of 3145556728 is 8276555413.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 367408 + ... + 375871.

It is an arithmetic number, because the mean of its divisors is an integer number (256896150).

Almost surely, 2^3145556728 is an apocalyptic number.

It is an amenable number.

3145556728 is a deficient number, since it is larger than the sum of its proper divisors (3019950872).

3145556728 is a wasteful number, since it uses less digits than its factorization.

3145556728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 743331 (or 743304 counting only the distinct ones).

The product of its digits is 1008000, while the sum is 46.

The square root of 3145556728 is about 56085.2630197987. The cubic root of 3145556728 is about 1465.2076379856.

The spelling of 3145556728 in words is "three billion, one hundred forty-five million, five hundred fifty-six thousand, seven hundred twenty-eight".