280129068 has 36 divisors (see below), whose sum is σ = 710760960. Its totient is φ = 93026016.

The previous prime is 280129061. The next prime is 280129081. The reversal of 280129068 is 860921082.

It is a tau number, because it is divible by the number of its divisors (36).

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 (280129061) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 4780 + ... + 24147.

It is an arithmetic number, because the mean of its divisors is an integer number (19743360).

Almost surely, 2^280129068 is an apocalyptic number.

It is an amenable number.

280129068 is an abundant number, since it is smaller than the sum of its proper divisors (430631892).

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

280129068 is a wasteful number, since it uses less digits than its factorization.

280129068 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29206 (or 29201 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 280129068 is about 16737.0567305007. The cubic root of 280129068 is about 654.3137680217.

The spelling of 280129068 in words is "two hundred eighty million, one hundred twenty-nine thousand, sixty-eight".