612281128 has 32 divisors (see below), whose sum is σ = 1179921600. Its totient is φ = 297698688.

The previous prime is 612281101. The next prime is 612281177. The reversal of 612281128 is 821182216.

612281128 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 612281128.

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, 76333 + ... + 83971.

It is an arithmetic number, because the mean of its divisors is an integer number (36872550).

Almost surely, 2^612281128 is an apocalyptic number.

It is an amenable number.

612281128 is a deficient number, since it is larger than the sum of its proper divisors (567640472).

612281128 is a wasteful number, since it uses less digits than its factorization.

612281128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7921 (or 7917 counting only the distinct ones).

The product of its digits is 3072, while the sum is 31.

The square root of 612281128 is about 24744.3150642728. The cubic root of 612281128 is about 849.1484565377.

The spelling of 612281128 in words is "six hundred twelve million, two hundred eighty-one thousand, one hundred twenty-eight".