216284404 has 24 divisors (see below), whose sum is σ = 458015040. Its totient is φ = 87240576.

The previous prime is 216284381. The next prime is 216284413. The reversal of 216284404 is 404482612.

It is a congruent number.

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, 226714 + ... + 227665.

It is an arithmetic number, because the mean of its divisors is an integer number (19083960).

Almost surely, 2^216284404 is an apocalyptic number.

It is an amenable number.

216284404 is an abundant number, since it is smaller than the sum of its proper divisors (241730636).

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

216284404 is a wasteful number, since it uses less digits than its factorization.

216284404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 454407 (or 454405 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 31.

The square root of 216284404 is about 14706.6108944243. The cubic root of 216284404 is about 600.2632215442.

The spelling of 216284404 in words is "two hundred sixteen million, two hundred eighty-four thousand, four hundred four".