1138518672 has 40 divisors (see below), whose sum is σ = 2985079776. Its totient is φ = 373840896.

The previous prime is 1138518671. The next prime is 1138518673. The reversal of 1138518672 is 2768158311.

It is an interprime number because it is at equal distance from previous prime (1138518671) and next prime (1138518673).

It is not an unprimeable number, because it can be changed into a prime (1138518671) 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, 173793 + ... + 180224.

Almost surely, 2^1138518672 is an apocalyptic number.

1138518672 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1138518672 is an abundant number, since it is smaller than the sum of its proper divisors (1846561104).

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

1138518672 is a wasteful number, since it uses less digits than its factorization.

1138518672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 354095 (or 354089 counting only the distinct ones).

The product of its digits is 80640, while the sum is 42.

The square root of 1138518672 is about 33741.9423270208. The cubic root of 1138518672 is about 1044.1912569261.

The spelling of 1138518672 in words is "one billion, one hundred thirty-eight million, five hundred eighteen thousand, six hundred seventy-two".