40190813 has 8 divisors (see below), whose sum is σ = 43575000. Its totient is φ = 36848448.

The previous prime is 40190803. The next prime is 40190819. The reversal of 40190813 is 31809104.

40190813 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 4 ways, for example, as 4214809 + 35976004 = 2053^2 + 5998^2 .

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

It is not a de Polignac number, because 40190813 - 2¹⁶ = 40125277 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40190819) 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 7 ways as a sum of consecutive naturals, for example, 8438 + ... + 12311.

It is an arithmetic number, because the mean of its divisors is an integer number (5446875).

Almost surely, 2^40190813 is an apocalyptic number.

It is an amenable number.

40190813 is a deficient number, since it is larger than the sum of its proper divisors (3384187).

40190813 is a wasteful number, since it uses less digits than its factorization.

40190813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20911.

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 40190813 is about 6339.6224651000. The cubic root of 40190813 is about 342.5381363044.

Adding to 40190813 its reverse (31809104), we get a palindrome (71999917).

The spelling of 40190813 in words is "forty million, one hundred ninety thousand, eight hundred thirteen".