280350005 has 32 divisors (see below), whose sum is σ = 377637120. Its totient is φ = 198443520.

The previous prime is 280350001. The next prime is 280350011. The reversal of 280350005 is 500053082.

It is not a de Polignac number, because 280350005 - 2² = 280350001 is a prime.

It is a super-2 number, since 2×280350005² = 157192250607000050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (280350001) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 156344 + ... + 158126.

It is an arithmetic number, because the mean of its divisors is an integer number (11801160).

Almost surely, 2^280350005 is an apocalyptic number.

It is an amenable number.

280350005 is a deficient number, since it is larger than the sum of its proper divisors (97287115).

280350005 is a wasteful number, since it uses less digits than its factorization.

280350005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1901.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 280350005 is about 16743.6556641613. The cubic root of 280350005 is about 654.4857412879.

The spelling of 280350005 in words is "two hundred eighty million, three hundred fifty thousand, five".