28084998 has 32 divisors (see below), whose sum is σ = 58512096. Its totient is φ = 8978688.

The previous prime is 28084997. The next prime is 28085009. The reversal of 28084998 is 89948082.

It is a super-2 number, since 2×28084998² = 1577534225320008, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28084997) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 15340 + ... + 17072.

It is an arithmetic number, because the mean of its divisors is an integer number (1828503).

Almost surely, 2^28084998 is an apocalyptic number.

28084998 is an abundant number, since it is smaller than the sum of its proper divisors (30427098).

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

28084998 is a wasteful number, since it uses less digits than its factorization.

28084998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1848.

The product of its (nonzero) digits is 331776, while the sum is 48.

The square root of 28084998 is about 5299.5280921984. The cubic root of 28084998 is about 303.9658534477.

The spelling of 28084998 in words is "twenty-eight million, eighty-four thousand, nine hundred ninety-eight".