280240104 has 32 divisors (see below), whose sum is σ = 741813120. Its totient is φ = 87918336.

The previous prime is 280240091. The next prime is 280240117. The reversal of 280240104 is 401042082.

It is an interprime number because it is at equal distance from previous prime (280240091) and next prime (280240117).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 343024 + ... + 343839.

It is an arithmetic number, because the mean of its divisors is an integer number (23181660).

Almost surely, 2^280240104 is an apocalyptic number.

280240104 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

280240104 is an abundant number, since it is smaller than the sum of its proper divisors (461573016).

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

280240104 is a wasteful number, since it uses less digits than its factorization.

280240104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 686889 (or 686885 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 21.

The square root of 280240104 is about 16740.3734725364. The cubic root of 280240104 is about 654.4002076844.

Adding to 280240104 its reverse (401042082), we get a palindrome (681282186).

The spelling of 280240104 in words is "two hundred eighty million, two hundred forty thousand, one hundred four".