397969794 has 32 divisors (see below), whose sum is σ = 886176000. Its totient is φ = 132386832.

The previous prime is 397969783. The next prime is 397969799. The reversal of 397969794 is 497969793.

It is not an unprimeable number, because it can be changed into a prime (397969799) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20247 + ... + 34725.

It is an arithmetic number, because the mean of its divisors is an integer number (27693000).

Almost surely, 2^397969794 is an apocalyptic number.

397969794 is an abundant number, since it is smaller than the sum of its proper divisors (488206206).

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

397969794 is a wasteful number, since it uses less digits than its factorization.

397969794 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14999 (or 14993 counting only the distinct ones).

The product of its digits is 23147208, while the sum is 63.

The square root of 397969794 is about 19949.1802839114. The cubic root of 397969794 is about 735.5576276459.

Subtracting 397969794 from its reverse (497969793), we obtain a palindrome (99999999).

The spelling of 397969794 in words is "three hundred ninety-seven million, nine hundred sixty-nine thousand, seven hundred ninety-four".