26840420 has 24 divisors (see below), whose sum is σ = 58184448. Its totient is φ = 10389600.

The previous prime is 26840351. The next prime is 26840423. The reversal of 26840420 is 2404862.

It is a self number, because there is not a number n which added to its sum of digits gives 26840420.

It is not an unprimeable number, because it can be changed into a prime (26840423) 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, 21026 + ... + 22265.

It is an arithmetic number, because the mean of its divisors is an integer number (2424352).

Almost surely, 2^26840420 is an apocalyptic number.

26840420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26840420 is an abundant number, since it is smaller than the sum of its proper divisors (31344028).

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

26840420 is a wasteful number, since it uses less digits than its factorization.

26840420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43331 (or 43329 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 26.

The square root of 26840420 is about 5180.7740734373. The cubic root of 26840420 is about 299.4077947085.

The spelling of 26840420 in words is "twenty-six million, eight hundred forty thousand, four hundred twenty".