40642723 has 8 divisors (see below), whose sum is σ = 44383680. Its totient is φ = 36909480.

The previous prime is 40642711. The next prime is 40642741. The reversal of 40642723 is 32724604.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 40642723 - 2⁹ = 40642211 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 40642691 and 40642700.

It is not an unprimeable number, because it can be changed into a prime (40640723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19548 + ... + 21526.

It is an arithmetic number, because the mean of its divisors is an integer number (5547960).

Almost surely, 2^40642723 is an apocalyptic number.

40642723 is a deficient number, since it is larger than the sum of its proper divisors (3740957).

40642723 is a wasteful number, since it uses less digits than its factorization.

40642723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3857.

The product of its (nonzero) digits is 8064, while the sum is 28.

The square root of 40642723 is about 6375.1645468960. The cubic root of 40642723 is about 343.8171999531.

The spelling of 40642723 in words is "forty million, six hundred forty-two thousand, seven hundred twenty-three".