28911064 has 64 divisors (see below), whose sum is σ = 67415040. Its totient is φ = 11318400.

The previous prime is 28911059. The next prime is 28911073. The reversal of 28911064 is 46011982.

It is a happy number.

It is a super-2 number, since 2×28911064² = 1671699243224192, which contains 22 as substring.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

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 15 ways as a sum of consecutive naturals, for example, 109797 + ... + 110059.

It is an arithmetic number, because the mean of its divisors is an integer number (1053360).

Almost surely, 2^28911064 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 28911064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33707520).

28911064 is an abundant number, since it is smaller than the sum of its proper divisors (38503976).

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

28911064 is a wasteful number, since it uses less digits than its factorization.

28911064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 440 (or 436 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 28911064 is about 5376.9009661700. The cubic root of 28911064 is about 306.9172924927.

The spelling of 28911064 in words is "twenty-eight million, nine hundred eleven thousand, sixty-four".