1390071240 has 256 divisors, whose sum is σ = 4889548800. Its totient is φ = 350583552.

The previous prime is 1390071197. The next prime is 1390071253. The reversal of 1390071240 is 421700931.

1390071240 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 (27).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2657619 + ... + 2658141.

It is an arithmetic number, because the mean of its divisors is an integer number (19099800).

Almost surely, 2^1390071240 is an apocalyptic number.

1390071240 is a gapful number since it is divisible by the number (10) 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 1390071240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2444774400).

1390071240 is an abundant number, since it is smaller than the sum of its proper divisors (3499477560).

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

1390071240 is a wasteful number, since it uses less digits than its factorization.

1390071240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 673 (or 663 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 27.

The square root of 1390071240 is about 37283.6591551849. The cubic root of 1390071240 is about 1116.0380955894.

The spelling of 1390071240 in words is "one billion, three hundred ninety million, seventy-one thousand, two hundred forty".