40422781 has 16 divisors (see below), whose sum is σ = 48263040. Its totient is φ = 33122880.

The previous prime is 40422779. The next prime is 40422793. The reversal of 40422781 is 18722404.

It is not a de Polignac number, because 40422781 - 2¹ = 40422779 is a prime.

It is a super-2 number, since 2×40422781² = 3268002447547922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40422721) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20791 + ... + 22651.

It is an arithmetic number, because the mean of its divisors is an integer number (3016440).

Almost surely, 2^40422781 is an apocalyptic number.

It is an amenable number.

40422781 is a deficient number, since it is larger than the sum of its proper divisors (7840259).

40422781 is a wasteful number, since it uses less digits than its factorization.

40422781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2004.

The product of its (nonzero) digits is 3584, while the sum is 28.

The square root of 40422781 is about 6357.8912384532. The cubic root of 40422781 is about 343.1958778844.

The spelling of 40422781 in words is "forty million, four hundred twenty-two thousand, seven hundred eighty-one".