28924992 has 112 divisors (see below), whose sum is σ = 89611200. Its totient is φ = 9123840.

The previous prime is 28924979. The next prime is 28924997. The reversal of 28924992 is 29942982.

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 (28924997) 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, 32392 + ... + 33272.

It is an arithmetic number, because the mean of its divisors is an integer number (800100).

Almost surely, 2^28924992 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 28924992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44805600).

28924992 is an abundant number, since it is smaller than the sum of its proper divisors (60686208).

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

28924992 is a wasteful number, since it uses less digits than its factorization.

28924992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 921 (or 905 counting only the distinct ones).

The product of its digits is 186624, while the sum is 45.

The square root of 28924992 is about 5378.1959800662. The cubic root of 28924992 is about 306.9665707180.

It can be divided in two parts, 289 and 24992, that added together give a square (25281 = 159²).

The spelling of 28924992 in words is "twenty-eight million, nine hundred twenty-four thousand, nine hundred ninety-two".