40738221 has 48 divisors (see below), whose sum is σ = 65729664. Its totient is φ = 25147584.

The previous prime is 40738207. The next prime is 40738231. The reversal of 40738221 is 12283704.

40738221 is a `hidden beast` number, since 407 + 38 + 221 = 666.

It is not a de Polignac number, because 40738221 - 2⁵ = 40738189 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40738231) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 206695 + ... + 206891.

It is an arithmetic number, because the mean of its divisors is an integer number (1369368).

Almost surely, 2^40738221 is an apocalyptic number.

It is an amenable number.

40738221 is a deficient number, since it is larger than the sum of its proper divisors (24991443).

40738221 is a wasteful number, since it uses less digits than its factorization.

40738221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272 (or 260 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 40738221 is about 6382.6499982374. The cubic root of 40738221 is about 344.0862778227.

The spelling of 40738221 in words is "forty million, seven hundred thirty-eight thousand, two hundred twenty-one".