40520493 has 48 divisors (see below), whose sum is σ = 66533376. Its totient is φ = 24494400.

The previous prime is 40520479. The next prime is 40520507. The reversal of 40520493 is 39402504.

40520493 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (40520479) and next prime (40520507).

It is not a de Polignac number, because 40520493 - 2⁴ = 40520477 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40520413) 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 47 ways as a sum of consecutive naturals, for example, 318996 + ... + 319122.

It is an arithmetic number, because the mean of its divisors is an integer number (1386112).

Almost surely, 2^40520493 is an apocalyptic number.

It is an amenable number.

40520493 is a deficient number, since it is larger than the sum of its proper divisors (26012883).

40520493 is a wasteful number, since it uses less digits than its factorization.

40520493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256 (or 244 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 40520493 is about 6365.5709091958. The cubic root of 40520493 is about 343.4721855398.

Adding to 40520493 its reverse (39402504), we get a palindrome (79922997).

The spelling of 40520493 in words is "forty million, five hundred twenty thousand, four hundred ninety-three".