228173857 has 16 divisors (see below), whose sum is σ = 243034624. Its totient is φ = 213840000.

The previous prime is 228173843. The next prime is 228173863. The reversal of 228173857 is 758371822.

It is a cyclic number.

It is not a de Polignac number, because 228173857 - 2¹¹ = 228171809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (228173807) 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, 379357 + ... + 379957.

It is an arithmetic number, because the mean of its divisors is an integer number (15189664).

Almost surely, 2^228173857 is an apocalyptic number.

It is an amenable number.

228173857 is a deficient number, since it is larger than the sum of its proper divisors (14860767).

228173857 is a wasteful number, since it uses less digits than its factorization.

228173857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1000.

The product of its digits is 188160, while the sum is 43.

The square root of 228173857 is about 15105.4247540412. The cubic root of 228173857 is about 611.0667145623.

The spelling of 228173857 in words is "two hundred twenty-eight million, one hundred seventy-three thousand, eight hundred fifty-seven".