1391118648 has 16 divisors (see below), whose sum is σ = 3477796680. Its totient is φ = 463706208.

The previous prime is 1391118647. The next prime is 1391118731. The reversal of 1391118648 is 8468111931.

It is a super-2 number, since 2×1391118648² = 3870422185626695808, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1391118647) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28981615 + ... + 28981662.

Almost surely, 2^1391118648 is an apocalyptic number.

It is an amenable number.

1391118648 is an abundant number, since it is smaller than the sum of its proper divisors (2086678032).

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

1391118648 is a wasteful number, since it uses less digits than its factorization.

1391118648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57963286 (or 57963282 counting only the distinct ones).

The product of its digits is 41472, while the sum is 42.

The square root of 1391118648 is about 37297.7029855727. The cubic root of 1391118648 is about 1116.3183339257.

The spelling of 1391118648 in words is "one billion, three hundred ninety-one million, one hundred eighteen thousand, six hundred forty-eight".