21628302 has 8 divisors (see below), whose sum is σ = 43256616. Its totient is φ = 7209432.

The previous prime is 21628283. The next prime is 21628339. The reversal of 21628302 is 20382612.

It is a sphenic number, since it is the product of 3 distinct primes.

21628302 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1802353 + ... + 1802364.

It is an arithmetic number, because the mean of its divisors is an integer number (5407077).

Almost surely, 2^21628302 is an apocalyptic number.

21628302 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21628302 is a wasteful number, since it uses less digits than its factorization.

21628302 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3604722.

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 21628302 is about 4650.6238291223. The cubic root of 21628302 is about 278.6169123441.

The spelling of 21628302 in words is "twenty-one million, six hundred twenty-eight thousand, three hundred two".