280315982 has 4 divisors (see below), whose sum is σ = 420473976. Its totient is φ = 140157990.

The previous prime is 280315979. The next prime is 280315991. The reversal of 280315982 is 289513082.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 289513082 = 2 ⋅144756541.

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, 70078994 + ... + 70078997.

It is an arithmetic number, because the mean of its divisors is an integer number (105118494).

Almost surely, 2^280315982 is an apocalyptic number.

280315982 is a deficient number, since it is larger than the sum of its proper divisors (140157994).

280315982 is a wasteful number, since it uses less digits than its factorization.

280315982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140157993.

The product of its (nonzero) digits is 34560, while the sum is 38.

The square root of 280315982 is about 16742.6396365687. The cubic root of 280315982 is about 654.4592643022.

The spelling of 280315982 in words is "two hundred eighty million, three hundred fifteen thousand, nine hundred eighty-two".