1391681088 has 140 divisors (see below), whose sum is σ = 4714841472. Its totient is φ = 397612800.

The previous prime is 1391681063. The next prime is 1391681089. The reversal of 1391681088 is 8801861931.

It is not an unprimeable number, because it can be changed into a prime (1391681089) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 17113 + ... + 55463.

Almost surely, 2^1391681088 is an apocalyptic number.

1391681088 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1391681088, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2357420736).

1391681088 is an abundant number, since it is smaller than the sum of its proper divisors (3323160384).

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

1391681088 is an equidigital number, since it uses as much as digits as its factorization.

1391681088 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38382 (or 38363 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 45.

The square root of 1391681088 is about 37305.2420981288. The cubic root of 1391681088 is about 1116.4687590259.

The spelling of 1391681088 in words is "one billion, three hundred ninety-one million, six hundred eighty-one thousand, eighty-eight".