26780620 has 12 divisors (see below), whose sum is σ = 56239344. Its totient is φ = 10712240.

The previous prime is 26780599. The next prime is 26780629. The reversal of 26780620 is 2608762.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (26780629) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 669496 + ... + 669535.

It is an arithmetic number, because the mean of its divisors is an integer number (4686612).

Almost surely, 2^26780620 is an apocalyptic number.

26780620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26780620 is an abundant number, since it is smaller than the sum of its proper divisors (29458724).

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

26780620 is a wasteful number, since it uses less digits than its factorization.

26780620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1339040 (or 1339038 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 26780620 is about 5174.9995169082. Note that the first 3 decimals coincide. The cubic root of 26780620 is about 299.1852708726.

The spelling of 26780620 in words is "twenty-six million, seven hundred eighty thousand, six hundred twenty".