40727639 has 4 divisors (see below), whose sum is σ = 41828424. Its totient is φ = 39626856.

The previous prime is 40727633. The next prime is 40727647. The reversal of 40727639 is 93672704.

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 40727639 - 2⁴ = 40727623 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40727633) 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, 550337 + ... + 550410.

It is an arithmetic number, because the mean of its divisors is an integer number (10457106).

Almost surely, 2^40727639 is an apocalyptic number.

40727639 is a deficient number, since it is larger than the sum of its proper divisors (1100785).

40727639 is a wasteful number, since it uses less digits than its factorization.

40727639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1100784.

The product of its (nonzero) digits is 63504, while the sum is 38.

The square root of 40727639 is about 6381.8209783729. The cubic root of 40727639 is about 344.0564824102.

It can be divided in two parts, 4072 and 7639, that added together give a palindrome (11711).

The spelling of 40727639 in words is "forty million, seven hundred twenty-seven thousand, six hundred thirty-nine".