1393039872 has 240 divisors, whose sum is σ = 4838708160. Its totient is φ = 376897536.

The previous prime is 1393039861. The next prime is 1393039897. The reversal of 1393039872 is 2789303931.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 611728 + ... + 614000.

It is an arithmetic number, because the mean of its divisors is an integer number (20161284).

Almost surely, 2^1393039872 is an apocalyptic number.

1393039872 is a gapful number since it is divisible by the number (12) 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 1393039872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2419354080).

1393039872 is an abundant number, since it is smaller than the sum of its proper divisors (3445668288).

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

1393039872 is a wasteful number, since it uses less digits than its factorization.

1393039872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2323 (or 2304 counting only the distinct ones).

The product of its (nonzero) digits is 244944, while the sum is 45.

The square root of 1393039872 is about 37323.4493582788. The cubic root of 1393039872 is about 1116.8319999150.

The spelling of 1393039872 in words is "one billion, three hundred ninety-three million, thirty-nine thousand, eight hundred seventy-two".