40393906 has 8 divisors (see below), whose sum is σ = 69246720. Its totient is φ = 17311668.

The previous prime is 40393883. The next prime is 40393919. The reversal of 40393906 is 60939304.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1442626 + ... + 1442653.

It is an arithmetic number, because the mean of its divisors is an integer number (8655840).

Almost surely, 2^40393906 is an apocalyptic number.

40393906 is a deficient number, since it is larger than the sum of its proper divisors (28852814).

40393906 is a wasteful number, since it uses less digits than its factorization.

40393906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2885288.

The product of its (nonzero) digits is 17496, while the sum is 34.

The square root of 40393906 is about 6355.6200326955. The cubic root of 40393906 is about 343.1141406291.

The spelling of 40393906 in words is "forty million, three hundred ninety-three thousand, nine hundred six".