1390213920 has 96 divisors (see below), whose sum is σ = 4412802240. Its totient is φ = 367877120.

The previous prime is 1390213897. The next prime is 1390213949. The reversal of 1390213920 is 293120931.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51826 + ... + 73934.

It is an arithmetic number, because the mean of its divisors is an integer number (45966690).

Almost surely, 2^1390213920 is an apocalyptic number.

1390213920 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 1390213920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2206401120).

1390213920 is an abundant number, since it is smaller than the sum of its proper divisors (3022588320).

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

1390213920 is a wasteful number, since it uses less digits than its factorization.

1390213920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22258 (or 22250 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 30.

The square root of 1390213920 is about 37285.5725448866. The cubic root of 1390213920 is about 1116.0762784928.

The spelling of 1390213920 in words is "one billion, three hundred ninety million, two hundred thirteen thousand, nine hundred twenty".