40446431 has 4 divisors (see below), whose sum is σ = 40656192. Its totient is φ = 40236672.

The previous prime is 40446409. The next prime is 40446433. The reversal of 40446431 is 13464404.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40446431 is a prime.

It is a super-2 number, since 2×40446431² = 3271827561275522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 40446431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40446433) 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, 104591 + ... + 104976.

It is an arithmetic number, because the mean of its divisors is an integer number (10164048).

Almost surely, 2^40446431 is an apocalyptic number.

40446431 is a deficient number, since it is larger than the sum of its proper divisors (209761).

40446431 is a wasteful number, since it uses less digits than its factorization.

40446431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209760.

The product of its (nonzero) digits is 4608, while the sum is 26.

The square root of 40446431 is about 6359.7508599001. The cubic root of 40446431 is about 343.2627955969.

The spelling of 40446431 in words is "forty million, four hundred forty-six thousand, four hundred thirty-one".