40307493 has 16 divisors (see below), whose sum is σ = 59901120. Its totient is φ = 23959296.

The previous prime is 40307479. The next prime is 40307549. The reversal of 40307493 is 39470304.

It is not a de Polignac number, because 40307493 - 2⁶ = 40307429 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 40307493.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40307413) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19830 + ... + 21767.

It is an arithmetic number, because the mean of its divisors is an integer number (3743820).

Almost surely, 2^40307493 is an apocalyptic number.

It is an amenable number.

40307493 is a deficient number, since it is larger than the sum of its proper divisors (19593627).

40307493 is a wasteful number, since it uses less digits than its factorization.

40307493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41636.

The product of its (nonzero) digits is 9072, while the sum is 30.

The square root of 40307493 is about 6348.8182364909. The cubic root of 40307493 is about 342.8692960226.

Adding to 40307493 its reverse (39470304), we get a palindrome (79777797).

The spelling of 40307493 in words is "forty million, three hundred seven thousand, four hundred ninety-three".