283128157 has 8 divisors (see below), whose sum is σ = 305295480. Its totient is φ = 261016320.

The previous prime is 283128143. The next prime is 283128163. The reversal of 283128157 is 751821382.

It can be written as a sum of positive squares in 4 ways, for example, as 138791961 + 144336196 = 11781^2 + 12014^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-283128157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (283128457) 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, 2944 + ... + 23977.

It is an arithmetic number, because the mean of its divisors is an integer number (38161935).

Almost surely, 2^283128157 is an apocalyptic number.

It is an amenable number.

283128157 is a deficient number, since it is larger than the sum of its proper divisors (22167323).

283128157 is a wasteful number, since it uses less digits than its factorization.

283128157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27743.

The product of its digits is 26880, while the sum is 37.

The square root of 283128157 is about 16826.4124815719. The cubic root of 283128157 is about 656.6405330572.

The spelling of 283128157 in words is "two hundred eighty-three million, one hundred twenty-eight thousand, one hundred fifty-seven".