40399994 has 8 divisors (see below), whose sum is σ = 61453728. Its totient is φ = 19915420.

The previous prime is 40399981. The next prime is 40400011. The reversal of 40399994 is 49999304.

It is a happy number.

40399994 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 142112 + ... + 142395.

It is an arithmetic number, because the mean of its divisors is an integer number (7681716).

Almost surely, 2^40399994 is an apocalyptic number.

40399994 is a deficient number, since it is larger than the sum of its proper divisors (21053734).

40399994 is a wasteful number, since it uses less digits than its factorization.

40399994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284580.

The product of its (nonzero) digits is 314928, while the sum is 47.

The square root of 40399994 is about 6356.0989608407. The cubic root of 40399994 is about 343.1313773376.

The spelling of 40399994 in words is "forty million, three hundred ninety-nine thousand, nine hundred ninety-four".