397141830 has 72 divisors (see below), whose sum is σ = 1049276592. Its totient is φ = 104217696.

The previous prime is 397141817. The next prime is 397141841. The reversal of 397141830 is 38141793.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 403519 + ... + 404501.

It is an arithmetic number, because the mean of its divisors is an integer number (14573286).

Almost surely, 2^397141830 is an apocalyptic number.

397141830 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 397141830, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (524638296).

397141830 is an abundant number, since it is smaller than the sum of its proper divisors (652134762).

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

397141830 is a wasteful number, since it uses less digits than its factorization.

397141830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1130 (or 1060 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 397141830 is about 19928.4176491763. The cubic root of 397141830 is about 735.0471717608.

The spelling of 397141830 in words is "three hundred ninety-seven million, one hundred forty-one thousand, eight hundred thirty".