6406290438 has 32 divisors (see below), whose sum is σ = 13622605920. Its totient is φ = 2001469440.

The previous prime is 6406290413. The next prime is 6406290469. The reversal of 6406290438 is 8340926046.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 6406290438.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 105723 + ... + 154886.

It is an arithmetic number, because the mean of its divisors is an integer number (425706435).

Almost surely, 2^6406290438 is an apocalyptic number.

6406290438 is an abundant number, since it is smaller than the sum of its proper divisors (7216315482).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6406290438 is a wasteful number, since it uses less digits than its factorization.

6406290438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260872.

The product of its (nonzero) digits is 248832, while the sum is 42.

The square root of 6406290438 is about 80039.3055816953. The cubic root of 6406290438 is about 1857.2436181549.

The spelling of 6406290438 in words is "six billion, four hundred six million, two hundred ninety thousand, four hundred thirty-eight".