1138885812 has 48 divisors (see below), whose sum is σ = 3047923200. Its totient is φ = 367381440.

The previous prime is 1138885757. The next prime is 1138885829. The reversal of 1138885812 is 2185888311.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 166737 + ... + 173432.

It is an arithmetic number, because the mean of its divisors is an integer number (63498400).

Almost surely, 2^1138885812 is an apocalyptic number.

1138885812 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1138885812 is an abundant number, since it is smaller than the sum of its proper divisors (1909037388).

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

1138885812 is a wasteful number, since it uses less digits than its factorization.

1138885812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 340213 (or 340205 counting only the distinct ones).

The product of its digits is 122880, while the sum is 45.

The square root of 1138885812 is about 33747.3822984835. The cubic root of 1138885812 is about 1044.3034855575.

The spelling of 1138885812 in words is "one billion, one hundred thirty-eight million, eight hundred eighty-five thousand, eight hundred twelve".