397427156 has 48 divisors (see below), whose sum is σ = 861227136. Its totient is φ = 156570624.

The previous prime is 397427153. The next prime is 397427221. The reversal of 397427156 is 651724793.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397427153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10760 + ... + 30176.

It is an arithmetic number, because the mean of its divisors is an integer number (17942232).

Almost surely, 2^397427156 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 397427156, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (430613568).

397427156 is an abundant number, since it is smaller than the sum of its proper divisors (463799980).

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

397427156 is a wasteful number, since it uses less digits than its factorization.

397427156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19488 (or 19486 counting only the distinct ones).

The product of its digits is 317520, while the sum is 44.

The square root of 397427156 is about 19935.5751359222. The cubic root of 397427156 is about 735.2231608300.

The spelling of 397427156 in words is "three hundred ninety-seven million, four hundred twenty-seven thousand, one hundred fifty-six".