40321390 has 16 divisors (see below), whose sum is σ = 74920320. Its totient is φ = 15608160.

The previous prime is 40321373. The next prime is 40321403. The reversal of 40321390 is 9312304.

40321390 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 64725 + ... + 65344.

It is an arithmetic number, because the mean of its divisors is an integer number (4682520).

Almost surely, 2^40321390 is an apocalyptic number.

40321390 is a deficient number, since it is larger than the sum of its proper divisors (34598930).

40321390 is a wasteful number, since it uses less digits than its factorization.

40321390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130107.

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 40321390 is about 6349.9125978237. The cubic root of 40321390 is about 342.9086957037.

Adding to 40321390 its reverse (9312304), we get a palindrome (49633694).

The spelling of 40321390 in words is "forty million, three hundred twenty-one thousand, three hundred ninety".