40423966 has 8 divisors (see below), whose sum is σ = 66148344. Its totient is φ = 18374520.

The previous prime is 40423961. The next prime is 40423967. The reversal of 40423966 is 66932404.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40423961) 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, 918705 + ... + 918748.

It is an arithmetic number, because the mean of its divisors is an integer number (8268543).

Almost surely, 2^40423966 is an apocalyptic number.

40423966 is a deficient number, since it is larger than the sum of its proper divisors (25724378).

40423966 is a wasteful number, since it uses less digits than its factorization.

40423966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1837466.

The product of its (nonzero) digits is 31104, while the sum is 34.

The square root of 40423966 is about 6357.9844290467. The cubic root of 40423966 is about 343.1992314648.

It can be divided in two parts, 4042 and 3966, that added together give a palindrome (8008).

The spelling of 40423966 in words is "forty million, four hundred twenty-three thousand, nine hundred sixty-six".