40118730 has 64 divisors (see below), whose sum is σ = 101122560. Its totient is φ = 10174464.

The previous prime is 40118719. The next prime is 40118731. The reversal of 40118730 is 3781104.

It is a self number, because there is not a number n which added to its sum of digits gives 40118730.

It is not an unprimeable number, because it can be changed into a prime (40118731) 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 31 ways as a sum of consecutive naturals, for example, 51786 + ... + 52554.

It is an arithmetic number, because the mean of its divisors is an integer number (1580040).

Almost surely, 2^40118730 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40118730, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50561280).

40118730 is an abundant number, since it is smaller than the sum of its proper divisors (61003830).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40118730 is a wasteful number, since it uses less digits than its factorization.

40118730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 863.

The product of its (nonzero) digits is 672, while the sum is 24.

The square root of 40118730 is about 6333.9347960016. The cubic root of 40118730 is about 342.3332308320. Note that the first 3 decimals are identical.

Adding to 40118730 its reverse (3781104), we get a palindrome (43899834).

The spelling of 40118730 in words is "forty million, one hundred eighteen thousand, seven hundred thirty".