1397323158 has 64 divisors (see below), whose sum is σ = 3491500032. Its totient is φ = 362184480.

The previous prime is 1397323139. The next prime is 1397323181. The reversal of 1397323158 is 8513237931.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 238735 + ... + 244517.

It is an arithmetic number, because the mean of its divisors is an integer number (54554688).

Almost surely, 2^1397323158 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1397323158, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1745750016).

1397323158 is an abundant number, since it is smaller than the sum of its proper divisors (2094176874).

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

1397323158 is a wasteful number, since it uses less digits than its factorization.

1397323158 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6329.

The product of its digits is 136080, while the sum is 42.

The square root of 1397323158 is about 37380.7859467936. The cubic root of 1397323158 is about 1117.9754982400.

The spelling of 1397323158 in words is "one billion, three hundred ninety-seven million, three hundred twenty-three thousand, one hundred fifty-eight".