397955142 has 96 divisors (see below), whose sum is σ = 997738560. Its totient is φ = 113541120.

The previous prime is 397955141. The next prime is 397955147. The reversal of 397955142 is 241559793.

It is a happy number.

397955142 is a `hidden beast` number, since 3 + 97 + 9 + 551 + 4 + 2 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397955141) 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 47 ways as a sum of consecutive naturals, for example, 281734 + ... + 283142.

It is an arithmetic number, because the mean of its divisors is an integer number (10393110).

Almost surely, 2^397955142 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 397955142, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (498869280).

397955142 is an abundant number, since it is smaller than the sum of its proper divisors (599783418).

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

397955142 is a wasteful number, since it uses less digits than its factorization.

397955142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1518 (or 1515 counting only the distinct ones).

The product of its digits is 340200, while the sum is 45.

The square root of 397955142 is about 19948.8130473971. The cubic root of 397955142 is about 735.5486005599.

The spelling of 397955142 in words is "three hundred ninety-seven million, nine hundred fifty-five thousand, one hundred forty-two".