40866739 has 4 divisors (see below), whose sum is σ = 43017640. Its totient is φ = 38715840.

The previous prime is 40866733. The next prime is 40866743. The reversal of 40866739 is 93766804.

It is a happy number.

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 40866739 - 2³ = 40866731 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40866695 and 40866704.

It is not an unprimeable number, because it can be changed into a prime (40866731) 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, 1075422 + ... + 1075459.

It is an arithmetic number, because the mean of its divisors is an integer number (10754410).

Almost surely, 2^40866739 is an apocalyptic number.

40866739 is a deficient number, since it is larger than the sum of its proper divisors (2150901).

40866739 is a wasteful number, since it uses less digits than its factorization.

40866739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2150900.

The product of its (nonzero) digits is 217728, while the sum is 43.

The square root of 40866739 is about 6392.7098323012. The cubic root of 40866739 is about 344.4477308470.

The spelling of 40866739 in words is "forty million, eight hundred sixty-six thousand, seven hundred thirty-nine".