281224028 has 6 divisors (see below), whose sum is σ = 492142056. Its totient is φ = 140612012.

The previous prime is 281223977. The next prime is 281224039. The reversal of 281224028 is 820422182.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35153000 + ... + 35153007.

It is an arithmetic number, because the mean of its divisors is an integer number (82023676).

Almost surely, 2^281224028 is an apocalyptic number.

It is an amenable number.

281224028 is a deficient number, since it is larger than the sum of its proper divisors (210918028).

281224028 is a wasteful number, since it uses less digits than its factorization.

281224028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70306011 (or 70306009 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 29.

The square root of 281224028 is about 16769.7354779376. The cubic root of 281224028 is about 655.1651802587.

The spelling of 281224028 in words is "two hundred eighty-one million, two hundred twenty-four thousand, twenty-eight".