40726643 has 4 divisors (see below), whose sum is σ = 42131040. Its totient is φ = 39322248.

The previous prime is 40726639. The next prime is 40726649. The reversal of 40726643 is 34662704.

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

It is a cyclic number.

It is not a de Polignac number, because 40726643 - 2² = 40726639 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40726649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 702155 + ... + 702212.

It is an arithmetic number, because the mean of its divisors is an integer number (10532760).

Almost surely, 2^40726643 is an apocalyptic number.

40726643 is a deficient number, since it is larger than the sum of its proper divisors (1404397).

40726643 is a wasteful number, since it uses less digits than its factorization.

40726643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1404396.

The product of its (nonzero) digits is 24192, while the sum is 32.

The square root of 40726643 is about 6381.7429437419. The cubic root of 40726643 is about 344.0536777378.

The spelling of 40726643 in words is "forty million, seven hundred twenty-six thousand, six hundred forty-three".