40423992 has 64 divisors (see below), whose sum is σ = 117158400. Its totient is φ = 11383680.

The previous prime is 40423967. The next prime is 40423993. The reversal of 40423992 is 29932404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40423993) 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 15 ways as a sum of consecutive naturals, for example, 10234 + ... + 13622.

It is an arithmetic number, because the mean of its divisors is an integer number (1830600).

Almost surely, 2^40423992 is an apocalyptic number.

40423992 is a gapful number since it is divisible by the number (42) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40423992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (58579200).

40423992 is an abundant number, since it is smaller than the sum of its proper divisors (76734408).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40423992 is a wasteful number, since it uses less digits than its factorization.

40423992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3476 (or 3472 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 33.

The square root of 40423992 is about 6357.9864737195. The cubic root of 40423992 is about 343.1993050448.

The spelling of 40423992 in words is "forty million, four hundred twenty-three thousand, nine hundred ninety-two".