1397690 has 32 divisors (see below), whose sum is σ = 2951424. Its totient is φ = 466560.

The previous prime is 1397681. The next prime is 1397717. The reversal of 1397690 is 967931.

It is a super-2 number, since 2×1397690² = 3907074672200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1397690.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2627 + ... + 3113.

It is an arithmetic number, because the mean of its divisors is an integer number (92232).

2^1397690 is an apocalyptic number.

1397690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1397690 is an abundant number, since it is smaller than the sum of its proper divisors (1553734).

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

1397690 is a wasteful number, since it uses less digits than its factorization.

1397690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 542.

The product of its (nonzero) digits is 10206, while the sum is 35.

The square root of 1397690 is about 1182.2394004600. The cubic root of 1397690 is about 111.8073324449.

The spelling of 1397690 in words is "one million, three hundred ninety-seven thousand, six hundred ninety".