228490 has 16 divisors (see below), whose sum is σ = 418248. Its totient is φ = 89856.

The previous prime is 228479. The next prime is 228509. The reversal of 228490 is 94822.

228490 = T₃₃₆ + T₃₃₇ + ... + T₃₃₉.

It can be written as a sum of positive squares in 4 ways, for example, as 114921 + 113569 = 339^2 + 337^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 574 + ... + 886.

2²²⁸⁴⁹⁰ is an apocalyptic number.

228490 is a deficient number, since it is larger than the sum of its proper divisors (189758).

228490 is a wasteful number, since it uses less digits than its factorization.

228490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 393.

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 228490 is about 478.0062761094. The cubic root of 228490 is about 61.1348802549.

The spelling of 228490 in words is "two hundred twenty-eight thousand, four hundred ninety".