280227138 has 8 divisors (see below), whose sum is σ = 560454288. Its totient is φ = 93409044.

The previous prime is 280227097. The next prime is 280227139. The reversal of 280227138 is 831722082.

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

280227138 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 280227099 and 280227108.

It is not an unprimeable number, because it can be changed into a prime (280227139) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23352256 + ... + 23352267.

It is an arithmetic number, because the mean of its divisors is an integer number (70056786).

Almost surely, 2^280227138 is an apocalyptic number.

280227138 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

280227138 is a wasteful number, since it uses less digits than its factorization.

280227138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46704528.

The product of its (nonzero) digits is 10752, while the sum is 33.

The square root of 280227138 is about 16739.9862007112. The cubic root of 280227138 is about 654.3901150486.

The spelling of 280227138 in words is "two hundred eighty million, two hundred twenty-seven thousand, one hundred thirty-eight".