26778816 has 56 divisors (see below), whose sum is σ = 78729840. Its totient is φ = 8925696.

The previous prime is 26778811. The next prime is 26778821. The reversal of 26778816 is 61887762.

It is an interprime number because it is at equal distance from previous prime (26778811) and next prime (26778821).

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

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6021 + ... + 9476.

It is an arithmetic number, because the mean of its divisors is an integer number (1405890).

Almost surely, 2^26778816 is an apocalyptic number.

It is an amenable number.

26778816 is an abundant number, since it is smaller than the sum of its proper divisors (51951024).

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

26778816 is a wasteful number, since it uses less digits than its factorization.

26778816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15518 (or 15502 counting only the distinct ones).

The product of its digits is 225792, while the sum is 45.

The square root of 26778816 is about 5174.8252144396. The cubic root of 26778816 is about 299.1785528013.

The spelling of 26778816 in words is "twenty-six million, seven hundred seventy-eight thousand, eight hundred sixteen".