1391143608 has 48 divisors (see below), whose sum is σ = 3788764200. Its totient is φ = 461119680.

The previous prime is 1391143573. The next prime is 1391143657. The reversal of 1391143608 is 8063411931.

1391143608 is a `hidden beast` number, since 1 + 3 + 9 + 1 + 1 + 43 + 608 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 41083 + ... + 66858.

Almost surely, 2^1391143608 is an apocalyptic number.

1391143608 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1391143608 is an abundant number, since it is smaller than the sum of its proper divisors (2397620592).

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

1391143608 is a wasteful number, since it uses less digits than its factorization.

1391143608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108132 (or 108125 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 1391143608 is about 37298.0375891279. The cubic root of 1391143608 is about 1116.3250103605.

The spelling of 1391143608 in words is "one billion, three hundred ninety-one million, one hundred forty-three thousand, six hundred eight".