1689446228 has 12 divisors (see below), whose sum is σ = 2975363412. Its totient is φ = 839342400.

The previous prime is 1689446189. The next prime is 1689446257. The reversal of 1689446228 is 8226449861.

It can be written as a sum of positive squares in 2 ways, for example, as 505260484 + 1184185744 = 22478^2 + 34412^2 .

It is a super-3 number, since 3×1689446228³ (a number of 29 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1344473 + ... + 1345728.

It is an arithmetic number, because the mean of its divisors is an integer number (247946951).

Almost surely, 2^1689446228 is an apocalyptic number.

It is an amenable number.

1689446228 is a deficient number, since it is larger than the sum of its proper divisors (1285917184).

1689446228 is a wasteful number, since it uses less digits than its factorization.

1689446228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2690362 (or 2690360 counting only the distinct ones).

The product of its digits is 1327104, while the sum is 50.

The square root of 1689446228 is about 41102.8737194858. The cubic root of 1689446228 is about 1191.0083085952.

The spelling of 1689446228 in words is "one billion, six hundred eighty-nine million, four hundred forty-six thousand, two hundred twenty-eight".