40040306 has 8 divisors (see below), whose sum is σ = 60533760. Its totient is φ = 19862388.

The previous prime is 40040293. The next prime is 40040393. The reversal of 40040306 is 60304004.

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

It is a super-2 number, since 2×40040306² = 3206452209147272, which contains 22 as substring.

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, 78566 + ... + 79073.

It is an arithmetic number, because the mean of its divisors is an integer number (7566720).

Almost surely, 2^40040306 is an apocalyptic number.

40040306 is a deficient number, since it is larger than the sum of its proper divisors (20493454).

40040306 is a wasteful number, since it uses less digits than its factorization.

40040306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157768.

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 40040306 is about 6327.7409871138. The cubic root of 40040306 is about 342.1100212580.

The spelling of 40040306 in words is "forty million, forty thousand, three hundred six".