28472416 has 48 divisors (see below), whose sum is σ = 67840416. Its totient is φ = 11483136.

The previous prime is 28472401. The next prime is 28472419. The reversal of 28472416 is 61427482.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28472419) 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 7 ways as a sum of consecutive naturals, for example, 70 + ... + 7546.

It is an arithmetic number, because the mean of its divisors is an integer number (1413342).

Almost surely, 2^28472416 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28472416, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33920208).

28472416 is an abundant number, since it is smaller than the sum of its proper divisors (39368000).

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

28472416 is a wasteful number, since it uses less digits than its factorization.

28472416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7511 (or 7503 counting only the distinct ones).

The product of its digits is 21504, while the sum is 34.

The square root of 28472416 is about 5335.9550222992. The cubic root of 28472416 is about 305.3571593102.

Adding to 28472416 its reverse (61427482), we get a palindrome (89899898).

The spelling of 28472416 in words is "twenty-eight million, four hundred seventy-two thousand, four hundred sixteen".