1138587772 has 12 divisors (see below), whose sum is σ = 2277175600. Its totient is φ = 487966176.

The previous prime is 1138587757. The next prime is 1138587811. The reversal of 1138587772 is 2777858311.

1138587772 is an admirable number.

It is a super-2 number, since 2×1138587772² = 2592764229095847968, which contains 22 as substring.

It is a hoax number, since the sum of its digits (49) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20331897 + ... + 20331952.

Almost surely, 2^1138587772 is an apocalyptic number.

It is an amenable number.

1138587772 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1138587772 is a wasteful number, since it uses less digits than its factorization.

1138587772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40663860 (or 40663858 counting only the distinct ones).

The product of its digits is 658560, while the sum is 49.

The square root of 1138587772 is about 33742.9662596518. The cubic root of 1138587772 is about 1044.2123814972.

The spelling of 1138587772 in words is "one billion, one hundred thirty-eight million, five hundred eighty-seven thousand, seven hundred seventy-two".