1137438728 has 32 divisors (see below), whose sum is σ = 2231228160. Its totient is φ = 543035520.

The previous prime is 1137438721. The next prime is 1137438767. The reversal of 1137438728 is 8278347311.

It is not an unprimeable number, because it can be changed into a prime (1137438721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21476 + ... + 52307.

It is an arithmetic number, because the mean of its divisors is an integer number (69725880).

Almost surely, 2^1137438728 is an apocalyptic number.

It is an amenable number.

1137438728 is a deficient number, since it is larger than the sum of its proper divisors (1093789432).

1137438728 is a wasteful number, since it uses less digits than its factorization.

1137438728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73877 (or 73873 counting only the distinct ones).

The product of its digits is 225792, while the sum is 44.

The square root of 1137438728 is about 33725.9355392849. The cubic root of 1137438728 is about 1043.8609959624.

The spelling of 1137438728 in words is "one billion, one hundred thirty-seven million, four hundred thirty-eight thousand, seven hundred twenty-eight".