40330431 has 36 divisors (see below), whose sum is σ = 62630568. Its totient is φ = 24992352.

The previous prime is 40330427. The next prime is 40330441. The reversal of 40330431 is 13403304.

It is not a de Polignac number, because 40330431 - 2² = 40330427 is a prime.

It is a super-2 number, since 2×40330431² = 3253087329291522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40330421) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 204625 + ... + 204821.

It is an arithmetic number, because the mean of its divisors is an integer number (1739738).

Almost surely, 2^40330431 is an apocalyptic number.

40330431 is a deficient number, since it is larger than the sum of its proper divisors (22300137).

40330431 is a wasteful number, since it uses less digits than its factorization.

40330431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 292 (or 266 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

The square root of 40330431 is about 6350.6244574845. The cubic root of 40330431 is about 342.9343231753.

Adding to 40330431 its reverse (13403304), we get a palindrome (53733735).

The spelling of 40330431 in words is "forty million, three hundred thirty thousand, four hundred thirty-one".