1390620750 has 64 divisors (see below), whose sum is σ = 3476348928. Its totient is φ = 370260000.

The previous prime is 1390620713. The next prime is 1390620769. The reversal of 1390620750 is 570260931.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 742315 + ... + 744185.

It is an arithmetic number, because the mean of its divisors is an integer number (54317952).

Almost surely, 2^1390620750 is an apocalyptic number.

1390620750 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1390620750, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1738174464).

1390620750 is an abundant number, since it is smaller than the sum of its proper divisors (2085728178).

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

1390620750 is a wasteful number, since it uses less digits than its factorization.

1390620750 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2882 (or 2872 counting only the distinct ones).

The product of its (nonzero) digits is 11340, while the sum is 33.

The square root of 1390620750 is about 37291.0277412677. The cubic root of 1390620750 is about 1116.1851368063.

The spelling of 1390620750 in words is "one billion, three hundred ninety million, six hundred twenty thousand, seven hundred fifty".