1138899772 has 24 divisors (see below), whose sum is σ = 2019603600. Its totient is φ = 561887616.

The previous prime is 1138899757. The next prime is 1138899779. The reversal of 1138899772 is 2779988311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1138899779) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 353304 + ... + 356512.

It is an arithmetic number, because the mean of its divisors is an integer number (84150150).

Almost surely, 2^1138899772 is an apocalyptic number.

It is an amenable number.

1138899772 is a deficient number, since it is larger than the sum of its proper divisors (880703828).

1138899772 is a wasteful number, since it uses less digits than its factorization.

1138899772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4365 (or 4363 counting only the distinct ones).

The product of its digits is 1524096, while the sum is 55.

The square root of 1138899772 is about 33747.5891287067. The cubic root of 1138899772 is about 1044.3077524229.

The spelling of 1138899772 in words is "one billion, one hundred thirty-eight million, eight hundred ninety-nine thousand, seven hundred seventy-two".