3142978728 has 32 divisors (see below), whose sum is σ = 7919324160. Its totient is φ = 1039409280.

The previous prime is 3142978693. The next prime is 3142978807. The reversal of 3142978728 is 8278792413.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 512533 + ... + 518628.

It is an arithmetic number, because the mean of its divisors is an integer number (247478880).

Almost surely, 2^3142978728 is an apocalyptic number.

It is an amenable number.

3142978728 is an abundant number, since it is smaller than the sum of its proper divisors (4776345432).

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

3142978728 is a wasteful number, since it uses less digits than its factorization.

3142978728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1031297 (or 1031293 counting only the distinct ones).

The product of its digits is 1354752, while the sum is 51.

The square root of 3142978728 is about 56062.2754443663. The cubic root of 3142978728 is about 1464.8072491188.

The spelling of 3142978728 in words is "three billion, one hundred forty-two million, nine hundred seventy-eight thousand, seven hundred twenty-eight".