280841487 has 4 divisors (see below), whose sum is σ = 374455320. Its totient is φ = 187227656.

The previous prime is 280841467. The next prime is 280841531. The reversal of 280841487 is 784148082.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 280841487 - 2¹² = 280837391 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (280841467) 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, 46806912 + ... + 46806917.

It is an arithmetic number, because the mean of its divisors is an integer number (93613830).

Almost surely, 2^280841487 is an apocalyptic number.

280841487 is a deficient number, since it is larger than the sum of its proper divisors (93613833).

280841487 is an equidigital number, since it uses as much as digits as its factorization.

280841487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93613832.

The product of its (nonzero) digits is 114688, while the sum is 42.

The square root of 280841487 is about 16758.3259008769. The cubic root of 280841487 is about 654.8679779754.

The spelling of 280841487 in words is "two hundred eighty million, eight hundred forty-one thousand, four hundred eighty-seven".