693504128 has 32 divisors (see below), whose sum is σ = 1383133260. Its totient is φ = 346364928.

The previous prime is 693504121. The next prime is 693504151. The reversal of 693504128 is 821405396.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 519475264 + 174028864 = 22792^2 + 13192^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is a junction number, because it is equal to n+sod(n) for n = 693504091 and 693504100.

It is not an unprimeable number, because it can be changed into a prime (693504121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 137426 + ... + 142382.

Almost surely, 2^693504128 is an apocalyptic number.

It is an amenable number.

693504128 is a deficient number, since it is larger than the sum of its proper divisors (689629132).

693504128 is a wasteful number, since it uses less digits than its factorization.

693504128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6064 (or 6052 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 38.

The square root of 693504128 is about 26334.4665410181. The cubic root of 693504128 is about 885.1489329827.

The spelling of 693504128 in words is "six hundred ninety-three million, five hundred four thousand, one hundred twenty-eight".