280140242 has 8 divisors (see below), whose sum is σ = 433765632. Its totient is φ = 135551700.

The previous prime is 280140233. The next prime is 280140247. The reversal of 280140242 is 242041082.

It is a happy number.

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

It is not an unprimeable number, because it can be changed into a prime (280140247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2259134 + ... + 2259257.

It is an arithmetic number, because the mean of its divisors is an integer number (54220704).

Almost surely, 2^280140242 is an apocalyptic number.

280140242 is a deficient number, since it is larger than the sum of its proper divisors (153625390).

280140242 is a wasteful number, since it uses less digits than its factorization.

280140242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4518424.

The product of its (nonzero) digits is 1024, while the sum is 23.

The square root of 280140242 is about 16737.3905373568. The cubic root of 280140242 is about 654.3224678267.

The spelling of 280140242 in words is "two hundred eighty million, one hundred forty thousand, two hundred forty-two".