280028002 has 8 divisors (see below), whose sum is σ = 434526300. Its totient is φ = 135185904.

The previous prime is 280027981. The next prime is 280028009. The reversal of 280028002 is 200820082.

It can be written as a sum of positive squares in 2 ways, for example, as 278923401 + 1104601 = 16701^2 + 1051^2 .

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

It is a super-2 number, since 2×280028002² = 156831363808224008, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (280028009) 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, 2413977 + ... + 2414092.

Almost surely, 2^280028002 is an apocalyptic number.

280028002 is a deficient number, since it is larger than the sum of its proper divisors (154498298).

280028002 is a wasteful number, since it uses less digits than its factorization.

280028002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4828100.

The product of its (nonzero) digits is 512, while the sum is 22.

The square root of 280028002 is about 16734.0372295510. The cubic root of 280028002 is about 654.2350699771.

Adding to 280028002 its reverse (200820082), we get a palindrome (480848084).

The spelling of 280028002 in words is "two hundred eighty million, twenty-eight thousand, two".