397924956 has 108 divisors (see below), whose sum is σ = 1190838376. Its totient is φ = 111291840.

The previous prime is 397924949. The next prime is 397924957. The reversal of 397924956 is 659429793.

397924956 is a `hidden beast` number, since 397 + 9 + 249 + 5 + 6 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397924957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 53115 + ... + 60141.

Almost surely, 2^397924956 is an apocalyptic number.

397924956 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 397924956, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (595419188).

397924956 is an abundant number, since it is smaller than the sum of its proper divisors (792913420).

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

397924956 is a wasteful number, since it uses less digits than its factorization.

397924956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7072 (or 7056 counting only the distinct ones).

The product of its digits is 3674160, while the sum is 54.

The square root of 397924956 is about 19948.0564466817. The cubic root of 397924956 is about 735.5300022900.

The spelling of 397924956 in words is "three hundred ninety-seven million, nine hundred twenty-four thousand, nine hundred fifty-six".