28020352 has 64 divisors (see below), whose sum is σ = 60220800. Its totient is φ = 12939264.

The previous prime is 28020341. The next prime is 28020361. The reversal of 28020352 is 25302082.

It is a tau number, because it is divible by the number of its divisors (64).

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 7 ways as a sum of consecutive naturals, for example, 171823 + ... + 171985.

It is an arithmetic number, because the mean of its divisors is an integer number (940950).

Almost surely, 2^28020352 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28020352, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30110400).

28020352 is an abundant number, since it is smaller than the sum of its proper divisors (32200448).

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

28020352 is a wasteful number, since it uses less digits than its factorization.

28020352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273 (or 261 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 28020352 is about 5293.4253560431. The cubic root of 28020352 is about 303.7324515821.

The spelling of 28020352 in words is "twenty-eight million, twenty thousand, three hundred fifty-two".