280386406960 has 40 divisors (see below), whose sum is σ = 711161888976. Its totient is φ = 101958693120.

The previous prime is 280386406943. The next prime is 280386406961. The reversal of 280386406960 is 69604683082.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Smith number, since the sum of its digits (52) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 280386406898 and 280386406907.

It is not an unprimeable number, because it can be changed into a prime (280386406961) 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, 159309579 + ... + 159311338.

Almost surely, 2^280386406960 is an apocalyptic number.

280386406960 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

280386406960 is an abundant number, since it is smaller than the sum of its proper divisors (430775482016).

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

280386406960 is a wasteful number, since it uses less digits than its factorization.

280386406960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 318620941 (or 318620935 counting only the distinct ones).

The product of its (nonzero) digits is 2985984, while the sum is 52.

The spelling of 280386406960 in words is "two hundred eighty billion, three hundred eighty-six million, four hundred six thousand, nine hundred sixty".