1391112618 has 32 divisors (see below), whose sum is σ = 3366728064. Its totient is φ = 374080512.

The previous prime is 1391112617. The next prime is 1391112623. The reversal of 1391112618 is 8162111931.

It is not an unprimeable number, because it can be changed into a prime (1391112617) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 973455 + ... + 974882.

It is an arithmetic number, because the mean of its divisors is an integer number (105210252).

Almost surely, 2^1391112618 is an apocalyptic number.

1391112618 is an abundant number, since it is smaller than the sum of its proper divisors (1975615446).

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

1391112618 is a wasteful number, since it uses less digits than its factorization.

1391112618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1948366.

The product of its digits is 2592, while the sum is 33.

The square root of 1391112618 is about 37297.6221494079. The cubic root of 1391112618 is about 1116.3167209769.

The spelling of 1391112618 in words is "one billion, three hundred ninety-one million, one hundred twelve thousand, six hundred eighteen".