396531946 has 4 divisors (see below), whose sum is σ = 594797922. Its totient is φ = 198265972.

The previous prime is 396531913. The next prime is 396531991. The reversal of 396531946 is 649135693.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 348382225 + 48149721 = 18665^2 + 6939^2 .

It is a junction number, because it is equal to n+sod(n) for n = 396531896 and 396531905.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99132985 + ... + 99132988.

Almost surely, 2^396531946 is an apocalyptic number.

396531946 is a deficient number, since it is larger than the sum of its proper divisors (198265976).

396531946 is a wasteful number, since it uses less digits than its factorization.

396531946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198265975.

The product of its digits is 524880, while the sum is 46.

The square root of 396531946 is about 19913.1099027751. The cubic root of 396531946 is about 734.6707124790.

The spelling of 396531946 in words is "three hundred ninety-six million, five hundred thirty-one thousand, nine hundred forty-six".