28019553 has 8 divisors (see below), whose sum is σ = 39557088. Its totient is φ = 17580864.

The previous prime is 28019549. The next prime is 28019573. The reversal of 28019553 is 35591082.

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

It is not a de Polignac number, because 28019553 - 2² = 28019549 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28019573) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 274651 + ... + 274752.

It is an arithmetic number, because the mean of its divisors is an integer number (4944636).

Almost surely, 2^28019553 is an apocalyptic number.

It is an amenable number.

28019553 is a deficient number, since it is larger than the sum of its proper divisors (11537535).

28019553 is a wasteful number, since it uses less digits than its factorization.

28019553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 549423.

The product of its (nonzero) digits is 10800, while the sum is 33.

The square root of 28019553 is about 5293.3498845249. The cubic root of 28019553 is about 303.7295645789.

The spelling of 28019553 in words is "twenty-eight million, nineteen thousand, five hundred fifty-three".