280420963 has 8 divisors (see below), whose sum is σ = 283236800. Its totient is φ = 277616808.

The previous prime is 280420949. The next prime is 280420969. The reversal of 280420963 is 369024082.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-280420963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (280420969) 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, 50020 + ... + 55342.

It is an arithmetic number, because the mean of its divisors is an integer number (35404600).

Almost surely, 2^280420963 is an apocalyptic number.

280420963 is a deficient number, since it is larger than the sum of its proper divisors (2815837).

280420963 is a wasteful number, since it uses less digits than its factorization.

280420963 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5841.

The product of its (nonzero) digits is 20736, while the sum is 34.

The square root of 280420963 is about 16745.7744819402. The cubic root of 280420963 is about 654.5409545104.

The spelling of 280420963 in words is "two hundred eighty million, four hundred twenty thousand, nine hundred sixty-three".