1397808 has 60 divisors (see below), whose sum is σ = 4149288. Its totient is φ = 437760.

The previous prime is 1397783. The next prime is 1397833. The reversal of 1397808 is 8087931.

It is an interprime number because it is at equal distance from previous prime (1397783) and next prime (1397833).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2163 + ... + 2733.

2^1397808 is an apocalyptic number.

1397808 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1397808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2074644).

1397808 is an abundant number, since it is smaller than the sum of its proper divisors (2751480).

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

1397808 is a wasteful number, since it uses less digits than its factorization.

1397808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 602 (or 593 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 36.

The square root of 1397808 is about 1182.2893046966. The cubic root of 1397808 is about 111.8104788016.

The spelling of 1397808 in words is "one million, three hundred ninety-seven thousand, eight hundred eight".