397469826 has 96 divisors (see below), whose sum is σ = 1006347888. Its totient is φ = 112250880.

The previous prime is 397469803. The next prime is 397469833. The reversal of 397469826 is 628964793.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 175430025 + 222039801 = 13245^2 + 14901^2 .

It is a Curzon number.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 161880 + ... + 164316.

Almost surely, 2^397469826 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 397469826, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (503173944).

397469826 is an abundant number, since it is smaller than the sum of its proper divisors (608878062).

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

397469826 is a wasteful number, since it uses less digits than its factorization.

397469826 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2516 (or 2513 counting only the distinct ones).

The product of its digits is 3919104, while the sum is 54.

The square root of 397469826 is about 19936.6453045642. The cubic root of 397469826 is about 735.2494724439.

The spelling of 397469826 in words is "three hundred ninety-seven million, four hundred sixty-nine thousand, eight hundred twenty-six".