280941391 has 24 divisors (see below), whose sum is σ = 306470304. Its totient is φ = 257402880.

The previous prime is 280941377. The next prime is 280941431. The reversal of 280941391 is 193149082.

It is not a de Polignac number, because 280941391 - 2⁵ = 280941359 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 280941391.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (280941091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2486151 + ... + 2486263.

It is an arithmetic number, because the mean of its divisors is an integer number (12769596).

Almost surely, 2^280941391 is an apocalyptic number.

280941391 is a deficient number, since it is larger than the sum of its proper divisors (25528913).

280941391 is a wasteful number, since it uses less digits than its factorization.

280941391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 319 (or 300 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 37.

The square root of 280941391 is about 16761.3063631687. The cubic root of 280941391 is about 654.9456210318.

The spelling of 280941391 in words is "two hundred eighty million, nine hundred forty-one thousand, three hundred ninety-one".