110398861 has 8 divisors (see below), whose sum is σ = 113648120. Its totient is φ = 107163648.

The previous prime is 110398859. The next prime is 110398877. The reversal of 110398861 is 168893011.

It is the 4290-th star number.

It can be written as a sum of positive squares in 4 ways, for example, as 33292900 + 77105961 = 5770^2 + 8781^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 110398861 - 2¹ = 110398859 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 110398861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (110398801) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 13645 + ... + 20173.

It is an arithmetic number, because the mean of its divisors is an integer number (14206015).

Almost surely, 2^110398861 is an apocalyptic number.

It is an amenable number.

110398861 is a deficient number, since it is larger than the sum of its proper divisors (3249259).

110398861 is an equidigital number, since it uses as much as digits as its factorization.

110398861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7023.

The product of its (nonzero) digits is 10368, while the sum is 37.

The square root of 110398861 is about 10507.0862278750. The cubic root of 110398861 is about 479.7204115415.

It can be divided in two parts, 11039 and 8861, that added together give a triangular number (19900 = T₁₉₉).

The spelling of 110398861 in words is "one hundred ten million, three hundred ninety-eight thousand, eight hundred sixty-one".