281428115 has 16 divisors (see below), whose sum is σ = 373128768. Its totient is φ = 202684416.

The previous prime is 281428111. The next prime is 281428153. The reversal of 281428115 is 511824182.

It is a cyclic number.

It is not a de Polignac number, because 281428115 - 2² = 281428111 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (281428111) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70022 + ... + 73931.

It is an arithmetic number, because the mean of its divisors is an integer number (23320548).

Almost surely, 2^281428115 is an apocalyptic number.

281428115 is a deficient number, since it is larger than the sum of its proper divisors (91700653).

281428115 is a wasteful number, since it uses less digits than its factorization.

281428115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143998.

The product of its digits is 5120, while the sum is 32.

The square root of 281428115 is about 16775.8193540584. The cubic root of 281428115 is about 655.3236285073.

The spelling of 281428115 in words is "two hundred eighty-one million, four hundred twenty-eight thousand, one hundred fifteen".