40530293 has 4 divisors (see below), whose sum is σ = 40543200. Its totient is φ = 40517388.

The previous prime is 40530283. The next prime is 40530317. The reversal of 40530293 is 39203504.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 40530293 - 2²⁴ = 23753077 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 (40530223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1646 + ... + 9152.

It is an arithmetic number, because the mean of its divisors is an integer number (10135800).

Almost surely, 2^40530293 is an apocalyptic number.

It is an amenable number.

40530293 is a deficient number, since it is larger than the sum of its proper divisors (12907).

40530293 is an equidigital number, since it uses as much as digits as its factorization.

40530293 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12906.

The product of its (nonzero) digits is 3240, while the sum is 26.

The square root of 40530293 is about 6366.3406286500. The cubic root of 40530293 is about 343.4998732261.

Adding to 40530293 its reverse (39203504), we get a palindrome (79733797).

The spelling of 40530293 in words is "forty million, five hundred thirty thousand, two hundred ninety-three".