1390788264 has 128 divisors (see below), whose sum is σ = 3767472000. Its totient is φ = 426875904.

The previous prime is 1390788251. The next prime is 1390788307. The reversal of 1390788264 is 4628870931.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 1364347 + ... + 1365365.

It is an arithmetic number, because the mean of its divisors is an integer number (29433375).

Almost surely, 2^1390788264 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 1390788264, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1883736000).

1390788264 is an abundant number, since it is smaller than the sum of its proper divisors (2376683736).

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

1390788264 is a wasteful number, since it uses less digits than its factorization.

1390788264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1147 (or 1143 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 48.

The square root of 1390788264 is about 37293.2737098796. The cubic root of 1390788264 is about 1116.2299535137.

The spelling of 1390788264 in words is "one billion, three hundred ninety million, seven hundred eighty-eight thousand, two hundred sixty-four".