26778812 has 6 divisors (see below), whose sum is σ = 46862928. Its totient is φ = 13389404.

The previous prime is 26778811. The next prime is 26778821. The reversal of 26778812 is 21887762.

It is a self number, because there is not a number n which added to its sum of digits gives 26778812.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26778811) by changing a digit.

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 as a sum of consecutive naturals, namely, 3347348 + ... + 3347355.

It is an arithmetic number, because the mean of its divisors is an integer number (7810488).

Almost surely, 2^26778812 is an apocalyptic number.

It is an amenable number.

26778812 is a deficient number, since it is larger than the sum of its proper divisors (20084116).

26778812 is a wasteful number, since it uses less digits than its factorization.

26778812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6694707 (or 6694705 counting only the distinct ones).

The product of its digits is 75264, while the sum is 41.

The square root of 26778812 is about 5174.8248279531. The cubic root of 26778812 is about 299.1785379050.

The spelling of 26778812 in words is "twenty-six million, seven hundred seventy-eight thousand, eight hundred twelve".