406638743 has 4 divisors (see below), whose sum is σ = 464730000. Its totient is φ = 348547488.

The previous prime is 406638733. The next prime is 406638767. The reversal of 406638743 is 347836604.

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 406638743 - 2¹⁰ = 406637719 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 406638743.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (406638733) 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, 29045618 + ... + 29045631.

It is an arithmetic number, because the mean of its divisors is an integer number (116182500).

Almost surely, 2^406638743 is an apocalyptic number.

406638743 is a deficient number, since it is larger than the sum of its proper divisors (58091257).

406638743 is an equidigital number, since it uses as much as digits as its factorization.

406638743 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58091256.

The product of its (nonzero) digits is 290304, while the sum is 41.

The square root of 406638743 is about 20165.2855918283. The cubic root of 406638743 is about 740.8601776073.

The spelling of 406638743 in words is "four hundred six million, six hundred thirty-eight thousand, seven hundred forty-three".