40320890 has 16 divisors (see below), whose sum is σ = 73067400. Its totient is φ = 16019520.

The previous prime is 40320887. The next prime is 40320899. The reversal of 40320890 is 9802304.

It can be written as a sum of positive squares in 4 ways, for example, as 15689521 + 24631369 = 3961^2 + 4963^2 .

It is not an unprimeable number, because it can be changed into a prime (40320899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12041 + ... + 15020.

Almost surely, 2^40320890 is an apocalyptic number.

40320890 is a deficient number, since it is larger than the sum of its proper divisors (32746510).

40320890 is a wasteful number, since it uses less digits than its factorization.

40320890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27217.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 40320890 is about 6349.8732270810. The cubic root of 40320890 is about 342.9072783000.

The spelling of 40320890 in words is "forty million, three hundred twenty thousand, eight hundred ninety".