396681449 has 4 divisors (see below), whose sum is σ = 417559440. Its totient is φ = 375803460.

The previous prime is 396681443. The next prime is 396681463. The reversal of 396681449 is 944186693.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 396681449 - 2²⁴ = 379904233 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 396681397 and 396681406.

It is not an unprimeable number, because it can be changed into a prime (396681443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10438967 + ... + 10439004.

It is an arithmetic number, because the mean of its divisors is an integer number (104389860).

Almost surely, 2^396681449 is an apocalyptic number.

It is an amenable number.

396681449 is a deficient number, since it is larger than the sum of its proper divisors (20877991).

396681449 is a wasteful number, since it uses less digits than its factorization.

396681449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20877990.

The product of its digits is 1119744, while the sum is 50.

The square root of 396681449 is about 19916.8634327798. The cubic root of 396681449 is about 734.7630309550.

The spelling of 396681449 in words is "three hundred ninety-six million, six hundred eighty-one thousand, four hundred forty-nine".