40642427 has 16 divisors (see below), whose sum is σ = 50880960. Its totient is φ = 31653888.

The previous prime is 40642421. The next prime is 40642447. The reversal of 40642427 is 72424604.

It is not a de Polignac number, because 40642427 - 2⁴ = 40642411 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 40642427.

It is not an unprimeable number, because it can be changed into a prime (40642421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2438 + ... + 9339.

It is an arithmetic number, because the mean of its divisors is an integer number (3180060).

Almost surely, 2^40642427 is an apocalyptic number.

40642427 is a deficient number, since it is larger than the sum of its proper divisors (10238533).

40642427 is a wasteful number, since it uses less digits than its factorization.

40642427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11830.

The product of its (nonzero) digits is 10752, while the sum is 29.

The square root of 40642427 is about 6375.1413317667. The cubic root of 40642427 is about 343.8163652802.

The spelling of 40642427 in words is "forty million, six hundred forty-two thousand, four hundred twenty-seven".