281064064 has 32 divisors (see below), whose sum is σ = 563728500. Its totient is φ = 139579392.

The previous prime is 281064053. The next prime is 281064097. The reversal of 281064064 is 460460182.

It can be written as a sum of positive squares in 2 ways, for example, as 280897600 + 166464 = 16760^2 + 408^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11704 + ... + 26440.

Almost surely, 2^281064064 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 281064064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (281864250).

281064064 is an abundant number, since it is smaller than the sum of its proper divisors (282664436).

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

281064064 is a wasteful number, since it uses less digits than its factorization.

281064064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14900 (or 14888 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 31.

The square root of 281064064 is about 16764.9653742559. The cubic root of 281064064 is about 655.0409344501.

The spelling of 281064064 in words is "two hundred eighty-one million, sixty-four thousand, sixty-four".