21614628 has 96 divisors (see below), whose sum is σ = 62899200. Its totient is φ = 5636736.

The previous prime is 21614597. The next prime is 21614651. The reversal of 21614628 is 82641612.

It is a junction number, because it is equal to n+sod(n) for n = 21614595 and 21614604.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 46051 + ... + 46517.

It is an arithmetic number, because the mean of its divisors is an integer number (655200).

Almost surely, 2^21614628 is an apocalyptic number.

21614628 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21614628, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31449600).

21614628 is an abundant number, since it is smaller than the sum of its proper divisors (41284572).

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

21614628 is a wasteful number, since it uses less digits than its factorization.

21614628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 529 (or 527 counting only the distinct ones).

The product of its digits is 4608, while the sum is 30.

The square root of 21614628 is about 4649.1534713322. The cubic root of 21614628 is about 278.5581835724.

The spelling of 21614628 in words is "twenty-one million, six hundred fourteen thousand, six hundred twenty-eight".