1390423950 has 72 divisors (see below), whose sum is σ = 3762649800. Its totient is φ = 368095680.

The previous prime is 1390423927. The next prime is 1390423961. The reversal of 1390423950 is 593240931.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 51436 + ... + 73664.

It is an arithmetic number, because the mean of its divisors is an integer number (52259025).

Almost surely, 2^1390423950 is an apocalyptic number.

1390423950 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 1390423950, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1881324900).

1390423950 is an abundant number, since it is smaller than the sum of its proper divisors (2372225850).

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

1390423950 is a wasteful number, since it uses less digits than its factorization.

1390423950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22386 (or 22378 counting only the distinct ones).

The product of its (nonzero) digits is 29160, while the sum is 36.

The square root of 1390423950 is about 37288.3889434768. The cubic root of 1390423950 is about 1116.1324803223.

The spelling of 1390423950 in words is "one billion, three hundred ninety million, four hundred twenty-three thousand, nine hundred fifty".