40918947 has 8 divisors (see below), whose sum is σ = 54640320. Its totient is φ = 27238440.

The previous prime is 40918931. The next prime is 40918957. The reversal of 40918947 is 74981904.

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

It is not a de Polignac number, because 40918947 - 2⁴ = 40918931 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 40918899 and 40918908.

It is not an unprimeable number, because it can be changed into a prime (40918957) 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, 7797 + ... + 11942.

It is an arithmetic number, because the mean of its divisors is an integer number (6830040).

Almost surely, 2^40918947 is an apocalyptic number.

40918947 is a deficient number, since it is larger than the sum of its proper divisors (13721373).

40918947 is a wasteful number, since it uses less digits than its factorization.

40918947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20433.

The product of its (nonzero) digits is 72576, while the sum is 42.

The square root of 40918947 is about 6396.7919303351. The cubic root of 40918947 is about 344.5943478364.

The spelling of 40918947 in words is "forty million, nine hundred eighteen thousand, nine hundred forty-seven".