40007722 has 4 divisors (see below), whose sum is σ = 60011586. Its totient is φ = 20003860.

The previous prime is 40007717. The next prime is 40007729. The reversal of 40007722 is 22770004.

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

It can be written as a sum of positive squares in only one way, i.e., 32273761 + 7733961 = 5681^2 + 2781^2 .

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

40007722 is a modest number, since divided by 7722 gives 40 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 40007693 and 40007702.

It is not an unprimeable number, because it can be changed into a prime (40007729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10001929 + ... + 10001932.

Almost surely, 2^40007722 is an apocalyptic number.

40007722 is a deficient number, since it is larger than the sum of its proper divisors (20003864).

40007722 is a wasteful number, since it uses less digits than its factorization.

40007722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20003863.

The product of its (nonzero) digits is 784, while the sum is 22.

The square root of 40007722 is about 6325.1657685787. The cubic root of 40007722 is about 342.0171953097.

Adding to 40007722 its reverse (22770004), we get a palindrome (62777726).

The spelling of 40007722 in words is "forty million, seven thousand, seven hundred twenty-two".