40221938 has 4 divisors (see below), whose sum is σ = 60332910. Its totient is φ = 20110968.

The previous prime is 40221913. The next prime is 40221947. The reversal of 40221938 is 83912204.

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., 38353249 + 1868689 = 6193^2 + 1367^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 40221938.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10055483 + ... + 10055486.

Almost surely, 2^40221938 is an apocalyptic number.

40221938 is a deficient number, since it is larger than the sum of its proper divisors (20110972).

40221938 is a wasteful number, since it uses less digits than its factorization.

40221938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20110971.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 40221938 is about 6342.0767891914. The cubic root of 40221938 is about 342.6265375059.

The spelling of 40221938 in words is "forty million, two hundred twenty-one thousand, nine hundred thirty-eight".