406768631 has 4 divisors (see below), whose sum is σ = 409359672. Its totient is φ = 404177592.

The previous prime is 406768613. The next prime is 406768657. The reversal of 406768631 is 136867604.

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

It is a cyclic number.

It is not a de Polignac number, because 406768631 - 2⁶ = 406768567 is a prime.

It is a super-2 number, since 2×406768631² = 330921438331228322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (406768031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1295285 + ... + 1295598.

It is an arithmetic number, because the mean of its divisors is an integer number (102339918).

Almost surely, 2^406768631 is an apocalyptic number.

406768631 is a deficient number, since it is larger than the sum of its proper divisors (2591041).

406768631 is a wasteful number, since it uses less digits than its factorization.

406768631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2591040.

The product of its (nonzero) digits is 145152, while the sum is 41.

The square root of 406768631 is about 20168.5059188825. The cubic root of 406768631 is about 740.9390507303.

The spelling of 406768631 in words is "four hundred six million, seven hundred sixty-eight thousand, six hundred thirty-one".