280238655 has 8 divisors (see below), whose sum is σ = 448381872. Its totient is φ = 149460608.

The previous prime is 280238599. The next prime is 280238663. The reversal of 280238655 is 556832082.

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

It is a cyclic number.

It is not a de Polignac number, because 280238655 - 2⁷ = 280238527 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9341274 + ... + 9341303.

It is an arithmetic number, because the mean of its divisors is an integer number (56047734).

Almost surely, 2^280238655 is an apocalyptic number.

280238655 is a deficient number, since it is larger than the sum of its proper divisors (168143217).

280238655 is a wasteful number, since it uses less digits than its factorization.

280238655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18682585.

The product of its (nonzero) digits is 115200, while the sum is 39.

The square root of 280238655 is about 16740.3301938761. The cubic root of 280238655 is about 654.3990798093.

The spelling of 280238655 in words is "two hundred eighty million, two hundred thirty-eight thousand, six hundred fifty-five".