397545792 has 112 divisors (see below), whose sum is σ = 1225003392. Its totient is φ = 111421440.

The previous prime is 397545791. The next prime is 397545817. The reversal of 397545792 is 297545793.

It is a tau number, because it is divible by the number of its divisors (112).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397545791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68442 + ... + 74022.

Almost surely, 2^397545792 is an apocalyptic number.

397545792 is a gapful number since it is divisible by the number (32) 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 397545792, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (612501696).

397545792 is an abundant number, since it is smaller than the sum of its proper divisors (827457600).

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

397545792 is a wasteful number, since it uses less digits than its factorization.

397545792 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5656 (or 5646 counting only the distinct ones).

The product of its digits is 2381400, while the sum is 51.

The square root of 397545792 is about 19938.5503986624. The cubic root of 397545792 is about 735.2963107192.

Subtracting from 397545792 its reverse (297545793), we obtain a palindrome (99999999).

The spelling of 397545792 in words is "three hundred ninety-seven million, five hundred forty-five thousand, seven hundred ninety-two".