28871064 has 48 divisors (see below), whose sum is σ = 78525720. Its totient is φ = 9582720.

The previous prime is 28871057. The next prime is 28871069. The reversal of 28871064 is 46017882.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28871069) 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 11 ways as a sum of consecutive naturals, for example, 19519 + ... + 20945.

Almost surely, 2^28871064 is an apocalyptic number.

28871064 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

28871064 is an abundant number, since it is smaller than the sum of its proper divisors (49654656).

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

28871064 is a wasteful number, since it uses less digits than its factorization.

28871064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1720 (or 1713 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 36.

The square root of 28871064 is about 5373.1800639845. The cubic root of 28871064 is about 306.7756816792.

The spelling of 28871064 in words is "twenty-eight million, eight hundred seventy-one thousand, sixty-four".