28598021 has 8 divisors (see below), whose sum is σ = 30298080. Its totient is φ = 26917488.

The previous prime is 28597991. The next prime is 28598071. The reversal of 28598021 is 12089582.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28598021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28598071) 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, 1811 + ... + 7776.

It is an arithmetic number, because the mean of its divisors is an integer number (3787260).

Almost surely, 2^28598021 is an apocalyptic number.

It is an amenable number.

28598021 is a deficient number, since it is larger than the sum of its proper divisors (1700059).

28598021 is a wasteful number, since it uses less digits than its factorization.

28598021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9763.

The product of its (nonzero) digits is 11520, while the sum is 35.

The square root of 28598021 is about 5347.7117536382. The cubic root of 28598021 is about 305.8055245417.

The spelling of 28598021 in words is "twenty-eight million, five hundred ninety-eight thousand, twenty-one".