26815420 has 24 divisors (see below), whose sum is σ = 56612304. Its totient is φ = 10669056.

The previous prime is 26815379. The next prime is 26815423. The reversal of 26815420 is 2451862.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26815423) 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, 387 + ... + 7333.

It is an arithmetic number, because the mean of its divisors is an integer number (2358846).

Almost surely, 2^26815420 is an apocalyptic number.

26815420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26815420 is an abundant number, since it is smaller than the sum of its proper divisors (29796884).

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

26815420 is a wasteful number, since it uses less digits than its factorization.

26815420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7149 (or 7147 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 26815420 is about 5178.3607444828. The cubic root of 26815420 is about 299.3148065951.

The spelling of 26815420 in words is "twenty-six million, eight hundred fifteen thousand, four hundred twenty".