40043493 has 24 divisors (see below), whose sum is σ = 67016768. Its totient is φ = 22565952.

The previous prime is 40043489. The next prime is 40043527. The reversal of 40043493 is 39434004.

It is not a de Polignac number, because 40043493 - 2² = 40043489 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40043293) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 246 + ... + 8952.

Almost surely, 2^40043493 is an apocalyptic number.

It is an amenable number.

40043493 is a deficient number, since it is larger than the sum of its proper divisors (26973275).

40043493 is a wasteful number, since it uses less digits than its factorization.

40043493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8793 (or 8790 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

The square root of 40043493 is about 6327.9928097304. The cubic root of 40043493 is about 342.1190977430.

Adding to 40043493 its reverse (39434004), we get a palindrome (79477497).

The spelling of 40043493 in words is "forty million, forty-three thousand, four hundred ninety-three".