28938024 has 24 divisors (see below), whose sum is σ = 78374010. Its totient is φ = 9645984.

The previous prime is 28938001. The next prime is 28938047. The reversal of 28938024 is 42083982.

It is an interprime number because it is at equal distance from previous prime (28938001) and next prime (28938047).

It can be written as a sum of positive squares in only one way, i.e., 28836900 + 101124 = 5370^2 + 318^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 28938024.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 200887 + ... + 201030.

Almost surely, 2^28938024 is an apocalyptic number.

28938024 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

28938024 is an abundant number, since it is smaller than the sum of its proper divisors (49435986).

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

28938024 is a wasteful number, since it uses less digits than its factorization.

28938024 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 401929 (or 401922 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 28938024 is about 5379.4074023074. The cubic root of 28938024 is about 307.0126645102.

The spelling of 28938024 in words is "twenty-eight million, nine hundred thirty-eight thousand, twenty-four".