40406406 has 8 divisors (see below), whose sum is σ = 80812824. Its totient is φ = 13468800.

The previous prime is 40406383. The next prime is 40406437. The reversal of 40406406 is 60460404.

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

40406406 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3367195 + ... + 3367206.

It is an arithmetic number, because the mean of its divisors is an integer number (10101603).

Almost surely, 2^40406406 is an apocalyptic number.

40406406 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

40406406 is a wasteful number, since it uses less digits than its factorization.

40406406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6734406.

The product of its (nonzero) digits is 2304, while the sum is 24.

The square root of 40406406 is about 6356.6033382617. The cubic root of 40406406 is about 343.1495295021.

The spelling of 40406406 in words is "forty million, four hundred six thousand, four hundred six".