28551744 has 224 divisors, whose sum is σ = 95585280. Its totient is φ = 8294400.

The previous prime is 28551709. The next prime is 28551749. The reversal of 28551744 is 44715582.

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 = 28551699 and 28551708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28551749) 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 31 ways as a sum of consecutive naturals, for example, 696364 + ... + 696404.

It is an arithmetic number, because the mean of its divisors is an integer number (426720).

Almost surely, 2^28551744 is an apocalyptic number.

28551744 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 28551744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47792640).

28551744 is an abundant number, since it is smaller than the sum of its proper divisors (67033536).

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

28551744 is a wasteful number, since it uses less digits than its factorization.

28551744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106 (or 90 counting only the distinct ones).

The product of its digits is 44800, while the sum is 36.

The square root of 28551744 is about 5343.3831979374. The cubic root of 28551744 is about 305.6404851200.

The spelling of 28551744 in words is "twenty-eight million, five hundred fifty-one thousand, seven hundred forty-four".