26778132 has 18 divisors (see below), whose sum is σ = 67689258. Its totient is φ = 8926032.

The previous prime is 26778127. The next prime is 26778133. The reversal of 26778132 is 23187762.

It can be written as a sum of positive squares in only one way, i.e., 15729156 + 11048976 = 3966^2 + 3324^2 .

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

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 743837 = 26778132 / (2 + 6 + 7 + 7 + 8 + 1 + 3 + 2).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26778133) 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, 371883 + ... + 371954.

Almost surely, 2^26778132 is an apocalyptic number.

It is an amenable number.

26778132 is an abundant number, since it is smaller than the sum of its proper divisors (40911126).

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

26778132 is a wasteful number, since it uses less digits than its factorization.

26778132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 743847 (or 743842 counting only the distinct ones).

The product of its digits is 28224, while the sum is 36.

The square root of 26778132 is about 5174.7591248289. The cubic root of 26778132 is about 299.1760055157.

The spelling of 26778132 in words is "twenty-six million, seven hundred seventy-eight thousand, one hundred thirty-two".