28998481 has 8 divisors (see below), whose sum is σ = 30840264. Its totient is φ = 27171840.

The previous prime is 28998467. The next prime is 28998523. The reversal of 28998481 is 18489982.

It can be written as a sum of positive squares in 4 ways, for example, as 256 + 28998225 = 16^2 + 5385^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 28998481 - 2⁵ = 28998449 is a prime.

It is a super-2 number, since 2×28998481² = 1681823800614722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28998401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 301 + ... + 7621.

It is an arithmetic number, because the mean of its divisors is an integer number (3855033).

Almost surely, 2^28998481 is an apocalyptic number.

It is an amenable number.

28998481 is a deficient number, since it is larger than the sum of its proper divisors (1841783).

28998481 is a wasteful number, since it uses less digits than its factorization.

28998481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7571.

The product of its digits is 331776, while the sum is 49.

The square root of 28998481 is about 5385.0237696783. The cubic root of 28998481 is about 307.2263182804.

The spelling of 28998481 in words is "twenty-eight million, nine hundred ninety-eight thousand, four hundred eighty-one".