1138837572 has 36 divisors (see below), whose sum is σ = 2879800560. Its totient is φ = 379471152.

The previous prime is 1138837549. The next prime is 1138837577. The reversal of 1138837572 is 2757388311.

1138837572 is a `hidden beast` number, since 11 + 38 + 8 + 37 + 572 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (1138837577) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 145183 + ... + 152825.

It is an arithmetic number, because the mean of its divisors is an integer number (79994460).

Almost surely, 2^1138837572 is an apocalyptic number.

1138837572 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1138837572 is an abundant number, since it is smaller than the sum of its proper divisors (1740962988).

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

1138837572 is a wasteful number, since it uses less digits than its factorization.

1138837572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11792 (or 11787 counting only the distinct ones).

The product of its digits is 282240, while the sum is 45.

The square root of 1138837572 is about 33746.6675688134. The cubic root of 1138837572 is about 1044.2887407631.

The spelling of 1138837572 in words is "one billion, one hundred thirty-eight million, eight hundred thirty-seven thousand, five hundred seventy-two".