280856948 has 12 divisors (see below), whose sum is σ = 493275972. Its totient is φ = 139920960.

The previous prime is 280856941. The next prime is 280856959. The reversal of 280856948 is 849658082.

It can be written as a sum of positive squares in 2 ways, for example, as 167391844 + 113465104 = 12938^2 + 10652^2 .

It is a junction number, because it is equal to n+sod(n) for n = 280856896 and 280856905.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (280856941) 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, 125633 + ... + 127848.

It is an arithmetic number, because the mean of its divisors is an integer number (41106331).

Almost surely, 2^280856948 is an apocalyptic number.

It is an amenable number.

280856948 is a deficient number, since it is larger than the sum of its proper divisors (212419024).

280856948 is a wasteful number, since it uses less digits than its factorization.

280856948 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253762 (or 253760 counting only the distinct ones).

The product of its (nonzero) digits is 1105920, while the sum is 50.

The square root of 280856948 is about 16758.7871876219. The cubic root of 280856948 is about 654.8799951078.

The spelling of 280856948 in words is "two hundred eighty million, eight hundred fifty-six thousand, nine hundred forty-eight".