40222478 has 16 divisors (see below), whose sum is σ = 64104480. Its totient is φ = 18891936.

The previous prime is 40222471. The next prime is 40222529. The reversal of 40222478 is 87422204.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a self number, because there is not a number n which added to its sum of digits gives 40222478.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40222471) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7226 + ... + 11517.

It is an arithmetic number, because the mean of its divisors is an integer number (4006530).

Almost surely, 2^40222478 is an apocalyptic number.

40222478 is a deficient number, since it is larger than the sum of its proper divisors (23882002).

40222478 is a wasteful number, since it uses less digits than its factorization.

40222478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18811.

The product of its (nonzero) digits is 7168, while the sum is 29.

The square root of 40222478 is about 6342.1193618537. The cubic root of 40222478 is about 342.6280708110.

The spelling of 40222478 in words is "forty million, two hundred twenty-two thousand, four hundred seventy-eight".