406464639 has 16 divisors (see below), whose sum is σ = 619941120. Its totient is φ = 232053120.

The previous prime is 406464607. The next prime is 406464689. The reversal of 406464639 is 936464604.

It is not a de Polignac number, because 406464639 - 2⁵ = 406464607 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 406464639.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (406464689) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16327 + ... + 32855.

It is an arithmetic number, because the mean of its divisors is an integer number (38746320).

Almost surely, 2^406464639 is an apocalyptic number.

406464639 is a deficient number, since it is larger than the sum of its proper divisors (213476481).

406464639 is a wasteful number, since it uses less digits than its factorization.

406464639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17710.

The product of its (nonzero) digits is 373248, while the sum is 42.

The square root of 406464639 is about 20160.9682059171. The cubic root of 406464639 is about 740.7544284334.

The spelling of 406464639 in words is "four hundred six million, four hundred sixty-four thousand, six hundred thirty-nine".