1138551612 has 48 divisors (see below), whose sum is σ = 3024145152. Its totient is φ = 330014080.

The previous prime is 1138551593. The next prime is 1138551643. The reversal of 1138551612 is 2161558311.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (33).

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, 184473 + ... + 190544.

It is an arithmetic number, because the mean of its divisors is an integer number (63003024).

Almost surely, 2^1138551612 is an apocalyptic number.

1138551612 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1138551612 is an abundant number, since it is smaller than the sum of its proper divisors (1885593540).

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

1138551612 is a wasteful number, since it uses less digits than its factorization.

1138551612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 375058 (or 375056 counting only the distinct ones).

The product of its digits is 7200, while the sum is 33.

The square root of 1138551612 is about 33742.4304400261. The cubic root of 1138551612 is about 1044.2013271249.

The spelling of 1138551612 in words is "one billion, one hundred thirty-eight million, five hundred fifty-one thousand, six hundred twelve".