26978825 has 6 divisors (see below), whose sum is σ = 33453774. Its totient is φ = 21583040.

The previous prime is 26978821. The next prime is 26978843. The reversal of 26978825 is 52887962.

It can be written as a sum of positive squares in 3 ways, for example, as 1948816 + 25030009 = 1396^2 + 5003^2 .

It is not a de Polignac number, because 26978825 - 2² = 26978821 is a prime.

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 26978825.

It is not an unprimeable number, because it can be changed into a prime (26978821) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 539552 + ... + 539601.

It is an arithmetic number, because the mean of its divisors is an integer number (5575629).

Almost surely, 2^26978825 is an apocalyptic number.

26978825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

26978825 is a deficient number, since it is larger than the sum of its proper divisors (6474949).

26978825 is a wasteful number, since it uses less digits than its factorization.

26978825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1079163 (or 1079158 counting only the distinct ones).

The product of its digits is 483840, while the sum is 47.

The square root of 26978825 is about 5194.1144577300. The cubic root of 26978825 is about 299.9215535631.

The spelling of 26978825 in words is "twenty-six million, nine hundred seventy-eight thousand, eight hundred twenty-five".