280427901 has 24 divisors (see below), whose sum is σ = 406731360. Its totient is φ = 170844960.

The previous prime is 280427899. The next prime is 280427909. The reversal of 280427901 is 109724082.

It is a happy number.

It is not a de Polignac number, because 280427901 - 2¹ = 280427899 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (280427909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 669070 + ... + 669488.

It is an arithmetic number, because the mean of its divisors is an integer number (16947140).

Almost surely, 2^280427901 is an apocalyptic number.

It is an amenable number.

280427901 is a deficient number, since it is larger than the sum of its proper divisors (126303459).

280427901 is a wasteful number, since it uses less digits than its factorization.

280427901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 697 (or 566 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 33.

The square root of 280427901 is about 16745.9816373959. The cubic root of 280427901 is about 654.5463525468.

The spelling of 280427901 in words is "two hundred eighty million, four hundred twenty-seven thousand, nine hundred one".