40628918 has 8 divisors (see below), whose sum is σ = 66483720. Its totient is φ = 18467680.

The previous prime is 40628911. The next prime is 40628921. The reversal of 40628918 is 81982604.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40628911) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 923363 + ... + 923406.

It is an arithmetic number, because the mean of its divisors is an integer number (8310465).

Almost surely, 2^40628918 is an apocalyptic number.

40628918 is a deficient number, since it is larger than the sum of its proper divisors (25854802).

40628918 is a wasteful number, since it uses less digits than its factorization.

40628918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1846782.

The product of its (nonzero) digits is 27648, while the sum is 38.

The square root of 40628918 is about 6374.0817377878. The cubic root of 40628918 is about 343.7782677360.

The spelling of 40628918 in words is "forty million, six hundred twenty-eight thousand, nine hundred eighteen".