40240431 has 24 divisors (see below), whose sum is σ = 72468864. Its totient is φ = 20903760.

The previous prime is 40240427. The next prime is 40240433. The reversal of 40240431 is 13404204.

It is not a de Polignac number, because 40240431 - 2² = 40240427 is a prime.

It is a super-2 number, since 2×40240431² = 3238584574131522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40240433) 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, 28341 + ... + 29726.

It is an arithmetic number, because the mean of its divisors is an integer number (3019536).

Almost surely, 2^40240431 is an apocalyptic number.

40240431 is a deficient number, since it is larger than the sum of its proper divisors (32228433).

40240431 is a wasteful number, since it uses less digits than its factorization.

40240431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58091 (or 58088 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 40240431 is about 6343.5345825494. The cubic root of 40240431 is about 342.6790397145.

Adding to 40240431 its reverse (13404204), we get a palindrome (53644635).

It can be divided in two parts, 40 and 240431, that added together give a triangular number (240471 = T₆₉₃).

The spelling of 40240431 in words is "forty million, two hundred forty thousand, four hundred thirty-one".