28455570 has 192 divisors, whose sum is σ = 91163520. Its totient is φ = 6272640.

The previous prime is 28455533. The next prime is 28455589. The reversal of 28455570 is 7555482.

It is a happy number.

28455570 is a `hidden beast` number, since 2 + 84 + 5 + 5 + 570 = 666.

It is a congruent number.

It is an unprimeable number.

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 95 ways as a sum of consecutive naturals, for example, 424677 + ... + 424743.

It is an arithmetic number, because the mean of its divisors is an integer number (474810).

Almost surely, 2^28455570 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28455570, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45581760).

28455570 is an abundant number, since it is smaller than the sum of its proper divisors (62707950).

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

28455570 is a wasteful number, since it uses less digits than its factorization.

28455570 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118 (or 101 counting only the distinct ones).

The product of its (nonzero) digits is 56000, while the sum is 36.

The square root of 28455570 is about 5334.3762521967. The cubic root of 28455570 is about 305.2969248533.

The spelling of 28455570 in words is "twenty-eight million, four hundred fifty-five thousand, five hundred seventy".