26878590 has 24 divisors (see below), whose sum is σ = 69884568. Its totient is φ = 7167600.

The previous prime is 26878589. The next prime is 26878601. The reversal of 26878590 is 9587862.

It is a Harshad number since it is a multiple of its sum of digits (45).

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 11 ways as a sum of consecutive naturals, for example, 149236 + ... + 149415.

It is an arithmetic number, because the mean of its divisors is an integer number (2911857).

Almost surely, 2^26878590 is an apocalyptic number.

26878590 is an abundant number, since it is smaller than the sum of its proper divisors (43005978).

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

26878590 is a wasteful number, since it uses less digits than its factorization.

26878590 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 298664 (or 298661 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 45.

The square root of 26878590 is about 5184.4565771159. The cubic root of 26878590 is about 299.5496576441.

The spelling of 26878590 in words is "twenty-six million, eight hundred seventy-eight thousand, five hundred ninety".