28670544 has 160 divisors (see below), whose sum is σ = 99200000. Its totient is φ = 7744896.

The previous prime is 28670539. The next prime is 28670561. The reversal of 28670544 is 44507682.

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 = 28670499 and 28670508.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 57207 + ... + 57705.

It is an arithmetic number, because the mean of its divisors is an integer number (620000).

Almost surely, 2^28670544 is an apocalyptic number.

28670544 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 28670544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49600000).

28670544 is an abundant number, since it is smaller than the sum of its proper divisors (70529456).

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

28670544 is a wasteful number, since it uses less digits than its factorization.

28670544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 542 (or 530 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 36.

The square root of 28670544 is about 5354.4882108377. The cubic root of 28670544 is about 306.0638083006.

The spelling of 28670544 in words is "twenty-eight million, six hundred seventy thousand, five hundred forty-four".