28443450 has 96 divisors (see below), whose sum is σ = 81709056. Its totient is φ = 6413760.

The previous prime is 28443439. The next prime is 28443469. The reversal of 28443450 is 5434482.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 108019 + ... + 108281.

It is an arithmetic number, because the mean of its divisors is an integer number (851136).

Almost surely, 2^28443450 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28443450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40854528).

28443450 is an abundant number, since it is smaller than the sum of its proper divisors (53265606).

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

28443450 is a wasteful number, since it uses less digits than its factorization.

28443450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 388 (or 383 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 30.

The square root of 28443450 is about 5333.2401033518. The cubic root of 28443450 is about 305.2535739476.

It can be divided in two parts, 284 and 43450, that added together give a palindrome (43734).

The spelling of 28443450 in words is "twenty-eight million, four hundred forty-three thousand, four hundred fifty".