40406906 has 8 divisors (see below), whose sum is σ = 63245664. Its totient is φ = 19325020.

The previous prime is 40406903. The next prime is 40406911. The reversal of 40406906 is 60960404.

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

It is not an unprimeable number, because it can be changed into a prime (40406903) 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, 439160 + ... + 439251.

It is an arithmetic number, because the mean of its divisors is an integer number (7905708).

Almost surely, 2^40406906 is an apocalyptic number.

40406906 is a gapful number since it is divisible by the number (46) formed by its first and last digit.

40406906 is a deficient number, since it is larger than the sum of its proper divisors (22838758).

40406906 is a wasteful number, since it uses less digits than its factorization.

40406906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 878436.

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 40406906 is about 6356.6426673205. The cubic root of 40406906 is about 343.1509449052.

The spelling of 40406906 in words is "forty million, four hundred six thousand, nine hundred six".