40680198 has 64 divisors (see below), whose sum is σ = 98219520. Its totient is φ = 12406176.

The previous prime is 40680187. The next prime is 40680251. The reversal of 40680198 is 89108604.

It is a happy number.

40680198 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 117061 + ... + 117407.

It is an arithmetic number, because the mean of its divisors is an integer number (1534680).

Almost surely, 2^40680198 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40680198, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49109760).

40680198 is an abundant number, since it is smaller than the sum of its proper divisors (57539322).

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

40680198 is a wasteful number, since it uses less digits than its factorization.

40680198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 538 (or 532 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 40680198 is about 6378.1030095162. The cubic root of 40680198 is about 343.9228407709.

The spelling of 40680198 in words is "forty million, six hundred eighty thousand, one hundred ninety-eight".