1397830 has 32 divisors (see below), whose sum is σ = 3029760. Its totient is φ = 453600.

The previous prime is 1397783. The next prime is 1397833. The reversal of 1397830 is 387931.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 1397792 and 1397801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1397833) 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, 805 + ... + 1855.

It is an arithmetic number, because the mean of its divisors is an integer number (94680).

2^1397830 is an apocalyptic number.

1397830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1397830 is an abundant number, since it is smaller than the sum of its proper divisors (1631930).

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

1397830 is a wasteful number, since it uses less digits than its factorization.

1397830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1084.

The product of its (nonzero) digits is 4536, while the sum is 31.

The square root of 1397830 is about 1182.2986086433. The cubic root of 1397830 is about 111.8110653909.

The spelling of 1397830 in words is "one million, three hundred ninety-seven thousand, eight hundred thirty".