28421064 has 64 divisors (see below), whose sum is σ = 90230400. Its totient is φ = 8119872.

The previous prime is 28421051. The next prime is 28421101. The reversal of 28421064 is 46012482.

It is a Harshad number since it is a multiple of its sum of digits (27).

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, 7887 + ... + 10910.

It is an arithmetic number, because the mean of its divisors is an integer number (1409850).

Almost surely, 2^28421064 is an apocalyptic number.

28421064 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

28421064 is an abundant number, since it is smaller than the sum of its proper divisors (61809336).

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

28421064 is a wasteful number, since it uses less digits than its factorization.

28421064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18819 (or 18809 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 27.

The square root of 28421064 is about 5331.1409660597. The cubic root of 28421064 is about 305.1734711471.

The spelling of 28421064 in words is "twenty-eight million, four hundred twenty-one thousand, sixty-four".