26228421 has 16 divisors (see below), whose sum is σ = 39168000. Its totient is φ = 17345664.

The previous prime is 26228407. The next prime is 26228429. The reversal of 26228421 is 12482262.

It is a happy number.

It is not a de Polignac number, because 26228421 - 2⁹ = 26227909 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26228429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 396 + ... + 7253.

It is an arithmetic number, because the mean of its divisors is an integer number (2448000).

Almost surely, 2^26228421 is an apocalyptic number.

It is an amenable number.

26228421 is a deficient number, since it is larger than the sum of its proper divisors (12939579).

26228421 is a wasteful number, since it uses less digits than its factorization.

26228421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7785 (or 7779 counting only the distinct ones).

The product of its digits is 3072, while the sum is 27.

The square root of 26228421 is about 5121.3690552429. The cubic root of 26228421 is about 297.1146379209.

The spelling of 26228421 in words is "twenty-six million, two hundred twenty-eight thousand, four hundred twenty-one".