1138896044 has 72 divisors (see below), whose sum is σ = 2370832464. Its totient is φ = 475516800.

The previous prime is 1138896041. The next prime is 1138896061. The reversal of 1138896044 is 4406988311.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a junction number, because it is equal to n+sod(n) for n = 1138895986 and 1138896004.

It is not an unprimeable number, because it can be changed into a prime (1138896041) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1994279 + ... + 1994849.

Almost surely, 2^1138896044 is an apocalyptic number.

It is an amenable number.

1138896044 is an abundant number, since it is smaller than the sum of its proper divisors (1231936420).

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

1138896044 is a wasteful number, since it uses less digits than its factorization.

1138896044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 927 (or 914 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 44.

The square root of 1138896044 is about 33747.5338950863. The cubic root of 1138896044 is about 1044.3066129654.

The spelling of 1138896044 in words is "one billion, one hundred thirty-eight million, eight hundred ninety-six thousand, forty-four".