690399324 has 18 divisors (see below), whose sum is σ = 1745176160. Its totient is φ = 230133096.

The previous prime is 690399319. The next prime is 690399379. The reversal of 690399324 is 423993096.

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

It is a self number, because there is not a number n which added to its sum of digits gives 690399324.

It is a congruent number.

It is an unprimeable number.

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, 9588844 + ... + 9588915.

Almost surely, 2^690399324 is an apocalyptic number.

It is an amenable number.

690399324 is an abundant number, since it is smaller than the sum of its proper divisors (1054776836).

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

690399324 is a wasteful number, since it uses less digits than its factorization.

690399324 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19177769 (or 19177764 counting only the distinct ones).

The product of its (nonzero) digits is 314928, while the sum is 45.

The square root of 690399324 is about 26275.4509761488. The cubic root of 690399324 is about 883.8260254946.

The spelling of 690399324 in words is "six hundred ninety million, three hundred ninety-nine thousand, three hundred twenty-four".