1391888046 has 16 divisors (see below), whose sum is σ = 2788928208. Its totient is φ = 463104000.

The previous prime is 1391888041. The next prime is 1391888063. The reversal of 1391888046 is 6408881931.

It is a junction number, because it is equal to n+sod(n) for n = 1391887986 and 1391888004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1391888041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 211155 + ... + 217646.

It is an arithmetic number, because the mean of its divisors is an integer number (174308013).

Almost surely, 2^1391888046 is an apocalyptic number.

1391888046 is an abundant number, since it is smaller than the sum of its proper divisors (1397040162).

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

1391888046 is a wasteful number, since it uses less digits than its factorization.

1391888046 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 429347.

The product of its (nonzero) digits is 331776, while the sum is 48.

The square root of 1391888046 is about 37308.0158411031. The cubic root of 1391888046 is about 1116.5240999347.

The spelling of 1391888046 in words is "one billion, three hundred ninety-one million, eight hundred eighty-eight thousand, forty-six".