280425128 has 32 divisors (see below), whose sum is σ = 550519200. Its totient is φ = 133737408.

The previous prime is 280425127. The next prime is 280425137. The reversal of 280425128 is 821524082.

It is a junction number, because it is equal to n+sod(n) for n = 280425094 and 280425103.

It is not an unprimeable number, because it can be changed into a prime (280425121) 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, 11975 + ... + 26537.

It is an arithmetic number, because the mean of its divisors is an integer number (17203725).

Almost surely, 2^280425128 is an apocalyptic number.

It is an amenable number.

280425128 is a deficient number, since it is larger than the sum of its proper divisors (270094072).

280425128 is a wasteful number, since it uses less digits than its factorization.

280425128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14681 (or 14677 counting only the distinct ones).

The product of its (nonzero) digits is 10240, while the sum is 32.

The square root of 280425128 is about 16745.8988412089. The cubic root of 280425128 is about 654.5441950546.

The spelling of 280425128 in words is "two hundred eighty million, four hundred twenty-five thousand, one hundred twenty-eight".