26978148 has 18 divisors (see below), whose sum is σ = 68194854. Its totient is φ = 8992704.

The previous prime is 26978131. The next prime is 26978191. The reversal of 26978148 is 84187962.

It can be written as a sum of positive squares in only one way, i.e., 26811684 + 166464 = 5178^2 + 408^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-3 number, since 3×26978148³ (a number of 23 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 374661 + ... + 374732.

It is an arithmetic number, because the mean of its divisors is an integer number (3788603).

Almost surely, 2^26978148 is an apocalyptic number.

It is an amenable number.

26978148 is an abundant number, since it is smaller than the sum of its proper divisors (41216706).

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

26978148 is a wasteful number, since it uses less digits than its factorization.

26978148 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 749403 (or 749398 counting only the distinct ones).

The product of its digits is 193536, while the sum is 45.

The square root of 26978148 is about 5194.0492874057. The cubic root of 26978148 is about 299.9190448228.

The spelling of 26978148 in words is "twenty-six million, nine hundred seventy-eight thousand, one hundred forty-eight".