21848428 has 24 divisors (see below), whose sum is σ = 45108224. Its totient is φ = 9061200.

The previous prime is 21848401. The next prime is 21848441. The reversal of 21848428 is 82484812.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11718 + ... + 13453.

Almost surely, 2^21848428 is an apocalyptic number.

21848428 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

21848428 is an abundant number, since it is smaller than the sum of its proper divisors (23259796).

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

21848428 is a wasteful number, since it uses less digits than its factorization.

21848428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25213 (or 25211 counting only the distinct ones).

The product of its digits is 32768, while the sum is 37.

The square root of 21848428 is about 4674.2302040015. The cubic root of 21848428 is about 279.5589484846.

The spelling of 21848428 in words is "twenty-one million, eight hundred forty-eight thousand, four hundred twenty-eight".