2678123898 has 48 divisors (see below), whose sum is σ = 6056013600. Its totient is φ = 886996656.

The previous prime is 2678123897. The next prime is 2678123911. The reversal of 2678123898 is 8983218762.

It is a happy number.

It is a super-3 number, since 3×2678123898³ (a number of 29 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (2678123897) 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 23 ways as a sum of consecutive naturals, for example, 58753 + ... + 93851.

It is an arithmetic number, because the mean of its divisors is an integer number (126166950).

Almost surely, 2^2678123898 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2678123898, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3028006800).

2678123898 is an abundant number, since it is smaller than the sum of its proper divisors (3377889702).

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

2678123898 is a wasteful number, since it uses less digits than its factorization.

2678123898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35273 (or 35261 counting only the distinct ones).

The product of its digits is 2322432, while the sum is 54.

The square root of 2678123898 is about 51750.5932139913. The cubic root of 2678123898 is about 1388.7057113425.

The spelling of 2678123898 in words is "two billion, six hundred seventy-eight million, one hundred twenty-three thousand, eight hundred ninety-eight".