40415923 has 4 divisors (see below), whose sum is σ = 40832680. Its totient is φ = 39999168.

The previous prime is 40415917. The next prime is 40415957. The reversal of 40415923 is 32951404.

40415923 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 40415923 - 2⁵ = 40415891 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40415891 and 40415900.

It is not an unprimeable number, because it can be changed into a prime (40412923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 208233 + ... + 208426.

It is an arithmetic number, because the mean of its divisors is an integer number (10208170).

Almost surely, 2^40415923 is an apocalyptic number.

40415923 is a deficient number, since it is larger than the sum of its proper divisors (416757).

40415923 is an equidigital number, since it uses as much as digits as its factorization.

40415923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 416756.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 40415923 is about 6357.3518858091. The cubic root of 40415923 is about 343.1764682810.

The spelling of 40415923 in words is "forty million, four hundred fifteen thousand, nine hundred twenty-three".