26778380 has 24 divisors (see below), whose sum is σ = 57756048. Its totient is φ = 10421568.

The previous prime is 26778377. The next prime is 26778413. The reversal of 26778380 is 8387762.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17354 + ... + 18833.

It is an arithmetic number, because the mean of its divisors is an integer number (2406502).

Almost surely, 2^26778380 is an apocalyptic number.

26778380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26778380 is an abundant number, since it is smaller than the sum of its proper divisors (30977668).

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

26778380 is a wasteful number, since it uses less digits than its factorization.

26778380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36233 (or 36231 counting only the distinct ones).

The product of its (nonzero) digits is 112896, while the sum is 41.

The square root of 26778380 is about 5174.7830872414. The cubic root of 26778380 is about 299.1769290980.

The spelling of 26778380 in words is "twenty-six million, seven hundred seventy-eight thousand, three hundred eighty".