406564438 has 8 divisors (see below), whose sum is σ = 696967632. Its totient is φ = 174241896.

The previous prime is 406564421. The next prime is 406564439. The reversal of 406564438 is 834465604.

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

It is a self number, because there is not a number n which added to its sum of digits gives 406564438.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (406564439) 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, 14520145 + ... + 14520172.

It is an arithmetic number, because the mean of its divisors is an integer number (87120954).

Almost surely, 2^406564438 is an apocalyptic number.

406564438 is a deficient number, since it is larger than the sum of its proper divisors (290403194).

406564438 is a wasteful number, since it uses less digits than its factorization.

406564438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29040326.

The product of its (nonzero) digits is 276480, while the sum is 40.

The square root of 406564438 is about 20163.4431087550. The cubic root of 406564438 is about 740.8150491242.

The spelling of 406564438 in words is "four hundred six million, five hundred sixty-four thousand, four hundred thirty-eight".