690273828 has 18 divisors (see below), whose sum is σ = 1744858934. Its totient is φ = 230091264.

The previous prime is 690273821. The next prime is 690273839. The reversal of 690273828 is 828372096.

It can be written as a sum of positive squares in only one way, i.e., 414448164 + 275825664 = 20358^2 + 16608^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is not an unprimeable number, because it can be changed into a prime (690273821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9587101 + ... + 9587172.

Almost surely, 2^690273828 is an apocalyptic number.

It is an amenable number.

690273828 is an abundant number, since it is smaller than the sum of its proper divisors (1054585106).

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

690273828 is a wasteful number, since it uses less digits than its factorization.

690273828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19174283 (or 19174278 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The square root of 690273828 is about 26273.0627830103. The cubic root of 690273828 is about 883.7724703282.

The spelling of 690273828 in words is "six hundred ninety million, two hundred seventy-three thousand, eight hundred twenty-eight".