280228710040 has 128 divisors (see below), whose sum is σ = 657487393920. Its totient is φ = 107393126400.

The previous prime is 280228709947. The next prime is 280228710059. The reversal of 280228710040 is 40017822082.

It is a junction number, because it is equal to n+sod(n) for n = 280228709978 and 280228710005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 150578710 + ... + 150580570.

It is an arithmetic number, because the mean of its divisors is an integer number (5136620265).

Almost surely, 2^280228710040 is an apocalyptic number.

280228710040 is a gapful number since it is divisible by the number (20) 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 280228710040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (328743696960).

280228710040 is an abundant number, since it is smaller than the sum of its proper divisors (377258683880).

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

280228710040 is a wasteful number, since it uses less digits than its factorization.

280228710040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3413 (or 3409 counting only the distinct ones).

The product of its (nonzero) digits is 14336, while the sum is 34.

The spelling of 280228710040 in words is "two hundred eighty billion, two hundred twenty-eight million, seven hundred ten thousand, forty".