397930742 has 16 divisors (see below), whose sum is σ = 659404800. Its totient is φ = 178587240.

The previous prime is 397930733. The next prime is 397930823. The reversal of 397930742 is 247039793.

It is a junction number, because it is equal to n+sod(n) for n = 397930693 and 397930702.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 112742 + ... + 116217.

It is an arithmetic number, because the mean of its divisors is an integer number (41212800).

Almost surely, 2^397930742 is an apocalyptic number.

397930742 is a deficient number, since it is larger than the sum of its proper divisors (261474058).

397930742 is a wasteful number, since it uses less digits than its factorization.

397930742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229051.

The product of its (nonzero) digits is 285768, while the sum is 44.

The square root of 397930742 is about 19948.2014728145. The cubic root of 397930742 is about 735.5335672469.

It can be divided in two parts, 397 and 930742, that added together give a palindrome (931139).

The spelling of 397930742 in words is "three hundred ninety-seven million, nine hundred thirty thousand, seven hundred forty-two".