397735842 has 48 divisors (see below), whose sum is σ = 979788960. Its totient is φ = 106952832.

The previous prime is 397735837. The next prime is 397735843. The reversal of 397735842 is 248537793.

It is a super-2 number, since 2×397735842² = 316387600022897928, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 397735791 and 397735800.

It is not an unprimeable number, because it can be changed into a prime (397735843) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 34792 + ... + 44787.

It is an arithmetic number, because the mean of its divisors is an integer number (20412270).

Almost surely, 2^397735842 is an apocalyptic number.

397735842 is an abundant number, since it is smaller than the sum of its proper divisors (582053118).

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

397735842 is a wasteful number, since it uses less digits than its factorization.

397735842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79615 (or 79608 counting only the distinct ones).

The product of its digits is 1270080, while the sum is 48.

The square root of 397735842 is about 19943.3157223166. The cubic root of 397735842 is about 735.4134635137.

The spelling of 397735842 in words is "three hundred ninety-seven million, seven hundred thirty-five thousand, eight hundred forty-two".