28471828 has 48 divisors (see below), whose sum is σ = 62826624. Its totient is φ = 10967040.

The previous prime is 28471789. The next prime is 28471829. The reversal of 28471828 is 82817482.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28471829) 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, 29400 + ... + 30352.

It is an arithmetic number, because the mean of its divisors is an integer number (1308888).

Almost surely, 2^28471828 is an apocalyptic number.

28471828 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28471828, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31413312).

28471828 is an abundant number, since it is smaller than the sum of its proper divisors (34354796).

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

28471828 is a wasteful number, since it uses less digits than its factorization.

28471828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1072 (or 1070 counting only the distinct ones).

The product of its digits is 57344, while the sum is 40.

The square root of 28471828 is about 5335.8999240990. The cubic root of 28471828 is about 305.3550572612.

The spelling of 28471828 in words is "twenty-eight million, four hundred seventy-one thousand, eight hundred twenty-eight".