40556423 has 4 divisors (see below), whose sum is σ = 41243880. Its totient is φ = 39868968.

The previous prime is 40556419. The next prime is 40556479. The reversal of 40556423 is 32465504.

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 40556423 - 2² = 40556419 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 (40556023) 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, 343640 + ... + 343757.

It is an arithmetic number, because the mean of its divisors is an integer number (10310970).

Almost surely, 2^40556423 is an apocalyptic number.

40556423 is a deficient number, since it is larger than the sum of its proper divisors (687457).

40556423 is an equidigital number, since it uses as much as digits as its factorization.

40556423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 687456.

The product of its (nonzero) digits is 14400, while the sum is 29.

The square root of 40556423 is about 6368.3924973262. The cubic root of 40556423 is about 343.5736758302.

The spelling of 40556423 in words is "forty million, five hundred fifty-six thousand, four hundred twenty-three".