40021726 has 4 divisors (see below), whose sum is σ = 60032592. Its totient is φ = 20010862.

The previous prime is 40021703. The next prime is 40021727. The reversal of 40021726 is 62712004.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 40021697 and 40021706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40021727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10005430 + ... + 10005433.

It is an arithmetic number, because the mean of its divisors is an integer number (15008148).

Almost surely, 2^40021726 is an apocalyptic number.

40021726 is a deficient number, since it is larger than the sum of its proper divisors (20010866).

40021726 is a wasteful number, since it uses less digits than its factorization.

40021726 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20010865.

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 40021726 is about 6326.2726782838. The cubic root of 40021726 is about 342.0570963575.

The spelling of 40021726 in words is "forty million, twenty-one thousand, seven hundred twenty-six".