28481832 has 24 divisors (see below), whose sum is σ = 77138490. Its totient is φ = 9493920.

The previous prime is 28481821. The next prime is 28481833. The reversal of 28481832 is 23818482.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 28451556 + 30276 = 5334^2 + 174^2 .

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

It is a super-2 number, since 2×28481832² = 1622429508152448, which contains 22 as substring.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

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

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (28481833) 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 5 ways as a sum of consecutive naturals, for example, 197719 + ... + 197862.

Almost surely, 2^28481832 is an apocalyptic number.

It is an amenable number.

28481832 is an abundant number, since it is smaller than the sum of its proper divisors (48656658).

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

28481832 is a wasteful number, since it uses less digits than its factorization.

28481832 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 395593 (or 395586 counting only the distinct ones).

The product of its digits is 24576, while the sum is 36.

The square root of 28481832 is about 5336.8372656471. The cubic root of 28481832 is about 305.3908167528.

The spelling of 28481832 in words is "twenty-eight million, four hundred eighty-one thousand, eight hundred thirty-two".