40642947 has 12 divisors (see below), whose sum is σ = 58777264. Its totient is φ = 27062640.

The previous prime is 40642933. The next prime is 40642951. The reversal of 40642947 is 74924604.

40642947 is a `hidden beast` number, since 4 + 0 + 642 + 9 + 4 + 7 = 666.

It is not a de Polignac number, because 40642947 - 2⁶ = 40642883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40642967) 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 11 ways as a sum of consecutive naturals, for example, 6978 + ... + 11400.

Almost surely, 2^40642947 is an apocalyptic number.

40642947 is a deficient number, since it is larger than the sum of its proper divisors (18134317).

40642947 is a wasteful number, since it uses less digits than its factorization.

40642947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5450 (or 5447 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 36.

The square root of 40642947 is about 6375.1821150458. The cubic root of 40642947 is about 343.8178315947.

The spelling of 40642947 in words is "forty million, six hundred forty-two thousand, nine hundred forty-seven".