397749834 has 12 divisors (see below), whose sum is σ = 861791346. Its totient is φ = 132583272.

The previous prime is 397749823. The next prime is 397749839. The reversal of 397749834 is 438947793.

It can be written as a sum of positive squares in only one way, i.e., 366914025 + 30835809 = 19155^2 + 5553^2 .

It is not an unprimeable number, because it can be changed into a prime (397749839) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11048589 + ... + 11048624.

Almost surely, 2^397749834 is an apocalyptic number.

397749834 is an abundant number, since it is smaller than the sum of its proper divisors (464041512).

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

397749834 is a wasteful number, since it uses less digits than its factorization.

397749834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22097221 (or 22097218 counting only the distinct ones).

The product of its digits is 4572288, while the sum is 54.

The square root of 397749834 is about 19943.6665134573. Note that the first 3 decimals coincide. The cubic root of 397749834 is about 735.4220871473.

The spelling of 397749834 in words is "three hundred ninety-seven million, seven hundred forty-nine thousand, eight hundred thirty-four".