280160728 has 16 divisors (see below), whose sum is σ = 526770000. Its totient is φ = 139688736.

The previous prime is 280160711. The next prime is 280160729. The reversal of 280160728 is 827061082.

It is a junction number, because it is equal to n+sod(n) for n = 280160693 and 280160702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (280160729) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45903 + ... + 51646.

It is an arithmetic number, because the mean of its divisors is an integer number (32923125).

Almost surely, 2^280160728 is an apocalyptic number.

It is an amenable number.

280160728 is a deficient number, since it is larger than the sum of its proper divisors (246609272).

280160728 is a wasteful number, since it uses less digits than its factorization.

280160728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97914 (or 97910 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 34.

The square root of 280160728 is about 16738.0025092602. The cubic root of 280160728 is about 654.3384171280.

The spelling of 280160728 in words is "two hundred eighty million, one hundred sixty thousand, seven hundred twenty-eight".