1391140296 has 192 divisors, whose sum is σ = 4707830400. Its totient is φ = 361304064.

The previous prime is 1391140279. The next prime is 1391140301. The reversal of 1391140296 is 6920411931.

It is a happy number.

1391140296 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

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

It is a self number, because there is not a number n which added to its sum of digits gives 1391140296.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 437400 + ... + 440568.

It is an arithmetic number, because the mean of its divisors is an integer number (24519950).

Almost surely, 2^1391140296 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1391140296, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2353915200).

1391140296 is an abundant number, since it is smaller than the sum of its proper divisors (3316690104).

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

1391140296 is a wasteful number, since it uses less digits than its factorization.

1391140296 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3268 (or 3261 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 1391140296 is about 37297.9931899828. The cubic root of 1391140296 is about 1116.3241244535.

The spelling of 1391140296 in words is "one billion, three hundred ninety-one million, one hundred forty thousand, two hundred ninety-six".