1390520 has 16 divisors (see below), whose sum is σ = 3128760. Its totient is φ = 556192.

The previous prime is 1390517. The next prime is 1390541. The reversal of 1390520 is 250931.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 1390492 and 1390501.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17342 + ... + 17421.

2^1390520 is an apocalyptic number.

1390520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1390520 is an abundant number, since it is smaller than the sum of its proper divisors (1738240).

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

1390520 is a wasteful number, since it uses less digits than its factorization.

1390520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34774 (or 34770 counting only the distinct ones).

The product of its (nonzero) digits is 270, while the sum is 20.

The square root of 1390520 is about 1179.2031207557. The cubic root of 1390520 is about 111.6158180411.

The spelling of 1390520 in words is "one million, three hundred ninety thousand, five hundred twenty".