40324431 has 8 divisors (see below), whose sum is σ = 61446784. Its totient is φ = 23042520.

The previous prime is 40324429. The next prime is 40324457. The reversal of 40324431 is 13442304.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 40324431 - 2¹ = 40324429 is a prime.

It is a super-2 number, since 2×40324431² = 3252119470947522, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 1920211 = 40324431 / (4 + 0 + 3 + 2 + 4 + 4 + 3 + 1).

It is a junction number, because it is equal to n+sod(n) for n = 40324398 and 40324407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40324231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 960085 + ... + 960126.

It is an arithmetic number, because the mean of its divisors is an integer number (7680848).

Almost surely, 2^40324431 is an apocalyptic number.

40324431 is a deficient number, since it is larger than the sum of its proper divisors (21122353).

40324431 is a wasteful number, since it uses less digits than its factorization.

40324431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1920221.

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 40324431 is about 6350.1520454238. The cubic root of 40324431 is about 342.9173161004.

Adding to 40324431 its reverse (13442304), we get a palindrome (53766735).

It can be divided in two parts, 40324 and 431, that added together give a triangular number (40755 = T₂₈₅).

The spelling of 40324431 in words is "forty million, three hundred twenty-four thousand, four hundred thirty-one".