280242512 has 40 divisors (see below), whose sum is σ = 594878592. Its totient is φ = 126835200.

The previous prime is 280242509. The next prime is 280242517. The reversal of 280242512 is 215242082.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (280242517) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39113 + ... + 45719.

Almost surely, 2^280242512 is an apocalyptic number.

280242512 is a gapful number since it is divisible by the number (22) 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 280242512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (297439296).

280242512 is an abundant number, since it is smaller than the sum of its proper divisors (314636080).

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

280242512 is a wasteful number, since it uses less digits than its factorization.

280242512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6867 (or 6861 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 26.

The square root of 280242512 is about 16740.4453943137. The cubic root of 280242512 is about 654.4020820190.

Adding to 280242512 its reverse (215242082), we get a palindrome (495484594).

The spelling of 280242512 in words is "two hundred eighty million, two hundred forty-two thousand, five hundred twelve".