228917490 has 32 divisors (see below), whose sum is σ = 557145216. Its totient is φ = 60184320.

The previous prime is 228917467. The next prime is 228917497. The reversal of 228917490 is 94719822.

It is not an unprimeable number, because it can be changed into a prime (228917497) 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, 51607 + ... + 55866.

It is an arithmetic number, because the mean of its divisors is an integer number (17410788).

Almost surely, 2^228917490 is an apocalyptic number.

228917490 is an abundant number, since it is smaller than the sum of its proper divisors (328227726).

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

228917490 is a wasteful number, since it uses less digits than its factorization.

228917490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107554.

The product of its (nonzero) digits is 72576, while the sum is 42.

The square root of 228917490 is about 15130.0194976742. The cubic root of 228917490 is about 611.7298297009.

It can be divided in two parts, 22891 and 7490, that added together give a triangular number (30381 = T₂₄₆).

The spelling of 228917490 in words is "two hundred twenty-eight million, nine hundred seventeen thousand, four hundred ninety".