40181824 has 14 divisors (see below), whose sum is σ = 79735934. Its totient is φ = 20090880.

The previous prime is 40181821. The next prime is 40181831. The reversal of 40181824 is 42818104.

It can be written as a sum of positive squares in only one way, i.e., 34574400 + 5607424 = 5880^2 + 2368^2 .

It is a super-2 number, since 2×40181824² = 3229157959933952, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 40181792 and 40181801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40181821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 313857 + ... + 313984.

Almost surely, 2^40181824 is an apocalyptic number.

It is an amenable number.

40181824 is a deficient number, since it is larger than the sum of its proper divisors (39554110).

40181824 is an equidigital number, since it uses as much as digits as its factorization.

40181824 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 627853 (or 627843 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 28.

The square root of 40181824 is about 6338.9134715659. The cubic root of 40181824 is about 342.5125972599.

Adding to 40181824 its reverse (42818104), we get a palindrome (82999928).

The spelling of 40181824 in words is "forty million, one hundred eighty-one thousand, eight hundred twenty-four".