406385647 has 8 divisors (see below), whose sum is σ = 416159744. Its totient is φ = 396626328.

The previous prime is 406385627. The next prime is 406385653. The reversal of 406385647 is 746583604.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 406385647 - 2²⁷ = 272167919 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (406385627) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68668 + ... + 74350.

It is an arithmetic number, because the mean of its divisors is an integer number (52019968).

Almost surely, 2^406385647 is an apocalyptic number.

406385647 is a deficient number, since it is larger than the sum of its proper divisors (9774097).

406385647 is a wasteful number, since it uses less digits than its factorization.

406385647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7389.

The product of its (nonzero) digits is 483840, while the sum is 43.

The square root of 406385647 is about 20159.0090778292. The cubic root of 406385647 is about 740.7064394580.

The spelling of 406385647 in words is "four hundred six million, three hundred eighty-five thousand, six hundred forty-seven".