228908390 has 16 divisors (see below), whose sum is σ = 433721520. Its totient is φ = 86744160.

The previous prime is 228908369. The next prime is 228908399. The reversal of 228908390 is 93809822.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228908399) 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, 602201 + ... + 602580.

It is an arithmetic number, because the mean of its divisors is an integer number (27107595).

Almost surely, 2^228908390 is an apocalyptic number.

228908390 is a deficient number, since it is larger than the sum of its proper divisors (204813130).

228908390 is a wasteful number, since it uses less digits than its factorization.

228908390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1204807.

The product of its (nonzero) digits is 62208, while the sum is 41.

The square root of 228908390 is about 15129.7187680406. The cubic root of 228908390 is about 611.7217237013.

The spelling of 228908390 in words is "two hundred twenty-eight million, nine hundred eight thousand, three hundred ninety".