280440060 has 48 divisors (see below), whose sum is σ = 796303872. Its totient is φ = 73729600.

The previous prime is 280440059. The next prime is 280440067. The reversal of 280440060 is 60044082.

It is a self number, because there is not a number n which added to its sum of digits gives 280440060.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (280440067) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28656 + ... + 37175.

It is an arithmetic number, because the mean of its divisors is an integer number (16589664).

Almost surely, 2^280440060 is an apocalyptic number.

280440060 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

280440060 is an abundant number, since it is smaller than the sum of its proper divisors (515863812).

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

280440060 is a wasteful number, since it uses less digits than its factorization.

280440060 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65914 (or 65912 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

The square root of 280440060 is about 16746.3446757792. The cubic root of 280440060 is about 654.5558125115. Note that the first 3 decimals are identical.

The spelling of 280440060 in words is "two hundred eighty million, four hundred forty thousand, sixty".