40721422 has 8 divisors (see below), whose sum is σ = 69808176. Its totient is φ = 17452032.

The previous prime is 40721399. The next prime is 40721441. The reversal of 40721422 is 22412704.

It is a happy number.

40721422 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a junction number, because it is equal to n+sod(n) for n = 40721393 and 40721402.

It is a congruent number.

It is an unprimeable number.

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, 1454323 + ... + 1454350.

It is an arithmetic number, because the mean of its divisors is an integer number (8726022).

Almost surely, 2^40721422 is an apocalyptic number.

40721422 is a deficient number, since it is larger than the sum of its proper divisors (29086754).

40721422 is a wasteful number, since it uses less digits than its factorization.

40721422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2908682.

The product of its (nonzero) digits is 896, while the sum is 22.

The square root of 40721422 is about 6381.3338731021. Note that the first 3 decimals coincide. The cubic root of 40721422 is about 344.0389749873.

The spelling of 40721422 in words is "forty million, seven hundred twenty-one thousand, four hundred twenty-two".