40618947 has 8 divisors (see below), whose sum is σ = 54320656. Its totient is φ = 26998272.

The previous prime is 40618931. The next prime is 40618969. The reversal of 40618947 is 74981604.

It is a happy number.

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

It is not a de Polignac number, because 40618947 - 2⁴ = 40618931 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40618927) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19078 + ... + 21099.

It is an arithmetic number, because the mean of its divisors is an integer number (6790082).

Almost surely, 2^40618947 is an apocalyptic number.

40618947 is a deficient number, since it is larger than the sum of its proper divisors (13701709).

40618947 is a wasteful number, since it uses less digits than its factorization.

40618947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40517.

The product of its (nonzero) digits is 48384, while the sum is 39.

The square root of 40618947 is about 6373.2995379160. The cubic root of 40618947 is about 343.7501425013.

The spelling of 40618947 in words is "forty million, six hundred eighteen thousand, nine hundred forty-seven".