28442630 has 8 divisors (see below), whose sum is σ = 51196752. Its totient is φ = 11377048.

The previous prime is 28442627. The next prime is 28442641. The reversal of 28442630 is 3624482.

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

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 28442593 and 28442602.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1422122 + ... + 1422141.

It is an arithmetic number, because the mean of its divisors is an integer number (6399594).

Almost surely, 2^28442630 is an apocalyptic number.

28442630 is a deficient number, since it is larger than the sum of its proper divisors (22754122).

28442630 is a wasteful number, since it uses less digits than its factorization.

28442630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2844270.

The product of its (nonzero) digits is 9216, while the sum is 29.

The square root of 28442630 is about 5333.1632264539. The cubic root of 28442630 is about 305.2506405208.

The spelling of 28442630 in words is "twenty-eight million, four hundred forty-two thousand, six hundred thirty".