40399346 has 8 divisors (see below), whose sum is σ = 65260524. Its totient is φ = 18645840.

The previous prime is 40399343. The next prime is 40399363. The reversal of 40399346 is 64399304.

40399346 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 33582025 + 6817321 = 5795^2 + 2611^2 .

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 (40399343) by changing a digit.

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, 776885 + ... + 776936.

Almost surely, 2^40399346 is an apocalyptic number.

40399346 is a deficient number, since it is larger than the sum of its proper divisors (24861178).

40399346 is a wasteful number, since it uses less digits than its factorization.

40399346 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1553836.

The product of its (nonzero) digits is 69984, while the sum is 38.

The square root of 40399346 is about 6356.0479859737. The cubic root of 40399346 is about 343.1295427638.

The spelling of 40399346 in words is "forty million, three hundred ninety-nine thousand, three hundred forty-six".