28331064 has 24 divisors (see below), whose sum is σ = 76730160. Its totient is φ = 9443664.

The previous prime is 28331053. The next prime is 28331087. The reversal of 28331064 is 46013382.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 196672 + ... + 196815.

It is an arithmetic number, because the mean of its divisors is an integer number (3197090).

Almost surely, 2^28331064 is an apocalyptic number.

28331064 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

28331064 is an abundant number, since it is smaller than the sum of its proper divisors (48399096).

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

28331064 is a wasteful number, since it uses less digits than its factorization.

28331064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 393499 (or 393492 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 28331064 is about 5322.6933032066. The cubic root of 28331064 is about 304.8510031004.

The spelling of 28331064 in words is "twenty-eight million, three hundred thirty-one thousand, sixty-four".