280137020 has 12 divisors (see below), whose sum is σ = 588287784. Its totient is φ = 112054800.

The previous prime is 280137019. The next prime is 280137029. The reversal of 280137020 is 20731082.

280137020 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (280137029) 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 3 ways as a sum of consecutive naturals, for example, 7003406 + ... + 7003445.

It is an arithmetic number, because the mean of its divisors is an integer number (49023982).

Almost surely, 2^280137020 is an apocalyptic number.

280137020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

280137020 is an abundant number, since it is smaller than the sum of its proper divisors (308150764).

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

280137020 is a wasteful number, since it uses less digits than its factorization.

280137020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14006860 (or 14006858 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 280137020 is about 16737.2942855170. The cubic root of 280137020 is about 654.3199592795.

The spelling of 280137020 in words is "two hundred eighty million, one hundred thirty-seven thousand, twenty".