40382831 has 4 divisors (see below), whose sum is σ = 40395672. Its totient is φ = 40369992.

The previous prime is 40382807. The next prime is 40382857. The reversal of 40382831 is 13828304.

It is a happy number.

40382831 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40382831 is a prime.

It is a super-2 number, since 2×40382831² = 3261546079149122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40382794 and 40382803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40382431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1841 + ... + 9173.

It is an arithmetic number, because the mean of its divisors is an integer number (10098918).

Almost surely, 2^40382831 is an apocalyptic number.

40382831 is a deficient number, since it is larger than the sum of its proper divisors (12841).

40382831 is an equidigital number, since it uses as much as digits as its factorization.

40382831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12840.

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 40382831 is about 6354.7486968408. The cubic root of 40382831 is about 343.0827799873.

The spelling of 40382831 in words is "forty million, three hundred eighty-two thousand, eight hundred thirty-one".