26878830 has 64 divisors (see below), whose sum is σ = 71912448. Its totient is φ = 6373760.

The previous prime is 26878823. The next prime is 26878849. The reversal of 26878830 is 3887862.

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, 14644 + ... + 16376.

It is an arithmetic number, because the mean of its divisors is an integer number (1123632).

Almost surely, 2^26878830 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 26878830, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35956224).

26878830 is an abundant number, since it is smaller than the sum of its proper divisors (45033618).

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

26878830 is a wasteful number, since it uses less digits than its factorization.

26878830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1801.

The product of its (nonzero) digits is 129024, while the sum is 42.

The square root of 26878830 is about 5184.4797231738. The cubic root of 26878830 is about 299.5505492051.

The spelling of 26878830 in words is "twenty-six million, eight hundred seventy-eight thousand, eight hundred thirty".