61790198 has 12 divisors (see below), whose sum is σ = 95006220. Its totient is φ = 30139920.

The previous prime is 61790191. The next prime is 61790207. The reversal of 61790198 is 89109716.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61790191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5828 + ... + 12551.

It is an arithmetic number, because the mean of its divisors is an integer number (7917185).

Almost surely, 2^61790198 is an apocalyptic number.

61790198 is a deficient number, since it is larger than the sum of its proper divisors (33216022).

61790198 is a wasteful number, since it uses less digits than its factorization.

61790198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18463 (or 18422 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 41.

The square root of 61790198 is about 7860.6741441177. The cubic root of 61790198 is about 395.3422190460.

The spelling of 61790198 in words is "sixty-one million, seven hundred ninety thousand, one hundred ninety-eight".