1390730 has 32 divisors (see below), whose sum is σ = 2799360. Its totient is φ = 493120.

The previous prime is 1390729. The next prime is 1390733. The reversal of 1390730 is 370931.

It is a junction number, because it is equal to n+sod(n) for n = 1390696 and 1390705.

It is not an unprimeable number, because it can be changed into a prime (1390733) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5036 + ... + 5304.

It is an arithmetic number, because the mean of its divisors is an integer number (87480).

2^1390730 is an apocalyptic number.

1390730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1390730 is an abundant number, since it is smaller than the sum of its proper divisors (1408630).

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

1390730 is a wasteful number, since it uses less digits than its factorization.

1390730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334.

The product of its (nonzero) digits is 567, while the sum is 23.

The square root of 1390730 is about 1179.2921605777. The cubic root of 1390730 is about 111.6214365967.

The spelling of 1390730 in words is "one million, three hundred ninety thousand, seven hundred thirty".