1397916 has 72 divisors (see below), whose sum is σ = 3974880. Its totient is φ = 411264.

The previous prime is 1397909. The next prime is 1397933. The reversal of 1397916 is 6197931.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13521 + ... + 13623.

2^1397916 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1397916, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1987440).

1397916 is an abundant number, since it is smaller than the sum of its proper divisors (2576964).

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

1397916 is a wasteful number, since it uses less digits than its factorization.

1397916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155 (or 150 counting only the distinct ones).

The product of its digits is 10206, while the sum is 36.

The square root of 1397916 is about 1182.3349779145. The cubic root of 1397916 is about 111.8133583628.

The spelling of 1397916 in words is "one million, three hundred ninety-seven thousand, nine hundred sixteen".