280042934 has 4 divisors (see below), whose sum is σ = 420064404. Its totient is φ = 140021466.

The previous prime is 280042907. The next prime is 280042979. The reversal of 280042934 is 439240082.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 439240082 = 2 ⋅219620041.

It is a self number, because there is not a number n which added to its sum of digits gives 280042934.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70010732 + ... + 70010735.

It is an arithmetic number, because the mean of its divisors is an integer number (105016101).

Almost surely, 2^280042934 is an apocalyptic number.

280042934 is a deficient number, since it is larger than the sum of its proper divisors (140021470).

280042934 is a wasteful number, since it uses less digits than its factorization.

280042934 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140021469.

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 280042934 is about 16734.4833801346. The cubic root of 280042934 is about 654.2466984147.

The spelling of 280042934 in words is "two hundred eighty million, forty-two thousand, nine hundred thirty-four".