1390704 has 40 divisors (see below), whose sum is σ = 4106880. Its totient is φ = 397248.

The previous prime is 1390703. The next prime is 1390709. The reversal of 1390704 is 4070931.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1390703) 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, 1734 + ... + 2405.

It is an arithmetic number, because the mean of its divisors is an integer number (102672).

2^1390704 is an apocalyptic number.

1390704 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1390704 is an abundant number, since it is smaller than the sum of its proper divisors (2716176).

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

1390704 is a wasteful number, since it uses less digits than its factorization.

1390704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4157 (or 4151 counting only the distinct ones).

The product of its (nonzero) digits is 756, while the sum is 24.

The square root of 1390704 is about 1179.2811369644. The cubic root of 1390704 is about 111.6207409967.

The spelling of 1390704 in words is "one million, three hundred ninety thousand, seven hundred four".