281628152 has 32 divisors (see below), whose sum is σ = 569630880. Its totient is φ = 129763200.

The previous prime is 281628133. The next prime is 281628157. The reversal of 281628152 is 251826182.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (281628157) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70973 + ... + 74835.

It is an arithmetic number, because the mean of its divisors is an integer number (17800965).

Almost surely, 2^281628152 is an apocalyptic number.

It is an amenable number.

281628152 is an abundant number, since it is smaller than the sum of its proper divisors (288002728).

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

281628152 is a wasteful number, since it uses less digits than its factorization.

281628152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4583 (or 4579 counting only the distinct ones).

The product of its digits is 15360, while the sum is 35.

The square root of 281628152 is about 16781.7803584721. The cubic root of 281628152 is about 655.4788581129.

The spelling of 281628152 in words is "two hundred eighty-one million, six hundred twenty-eight thousand, one hundred fifty-two".