28922544 has 90 divisors (see below), whose sum is σ = 94181100. Its totient is φ = 8261568.

The previous prime is 28922521. The next prime is 28922549. The reversal of 28922544 is 44522982.

28922544 is a `hidden beast` number, since 28 + 92 + 2 + 544 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 28922499 and 28922508.

It is not an unprimeable number, because it can be changed into a prime (28922549) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 5007 + ... + 9105.

Almost surely, 2^28922544 is an apocalyptic number.

28922544 is a gapful number since it is divisible by the number (24) 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 28922544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47090550).

28922544 is an abundant number, since it is smaller than the sum of its proper divisors (65258556).

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

28922544 is a wasteful number, since it uses less digits than its factorization.

28922544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4127 (or 4111 counting only the distinct ones).

The product of its digits is 46080, while the sum is 36.

The square root of 28922544 is about 5377.9683896431. The cubic root of 28922544 is about 306.9579106711.

The spelling of 28922544 in words is "twenty-eight million, nine hundred twenty-two thousand, five hundred forty-four".