1390020 has 24 divisors (see below), whose sum is σ = 3892224. Its totient is φ = 370656.

The previous prime is 1390019. The next prime is 1390027. The reversal of 1390020 is 200931.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is not an unprimeable number, because it can be changed into a prime (1390027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11524 + ... + 11643.

It is an arithmetic number, because the mean of its divisors is an integer number (162176).

2^1390020 is an apocalyptic number.

1390020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1390020 is an abundant number, since it is smaller than the sum of its proper divisors (2502204).

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

1390020 is a wasteful number, since it uses less digits than its factorization.

1390020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23179 (or 23177 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 15.

The square root of 1390020 is about 1178.9910941139. The cubic root of 1390020 is about 111.6024382505.

Adding to 1390020 its reverse (200931), we get a palindrome (1590951).

The spelling of 1390020 in words is "one million, three hundred ninety thousand, twenty".