281969064 has 72 divisors (see below), whose sum is σ = 826964190. Its totient is φ = 86755968.

The previous prime is 281969053. The next prime is 281969069. The reversal of 281969064 is 460969182.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 52446564 + 229522500 = 7242^2 + 15150^2 .

It is a tau number, because it is divible by the number of its divisors (72).

It is not an unprimeable number, because it can be changed into a prime (281969069) 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 17 ways as a sum of consecutive naturals, for example, 582 + ... + 23754.

Almost surely, 2^281969064 is an apocalyptic number.

281969064 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 281969064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (413482095).

281969064 is an abundant number, since it is smaller than the sum of its proper divisors (544995126).

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

281969064 is a wasteful number, since it uses less digits than its factorization.

281969064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23211 (or 23191 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 45.

The square root of 281969064 is about 16791.9344924878. The cubic root of 281969064 is about 655.7432380537.

The spelling of 281969064 in words is "two hundred eighty-one million, nine hundred sixty-nine thousand, sixty-four".