690659424 has 432 divisors, whose sum is σ = 2586179232. Its totient is φ = 170201088.

The previous prime is 690659399. The next prime is 690659441. The reversal of 690659424 is 424956096.

It is a self number, because there is not a number n which added to its sum of digits gives 690659424.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 9461052 + ... + 9461124.

It is an arithmetic number, because the mean of its divisors is an integer number (5986526).

Almost surely, 2^690659424 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 690659424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1293089616).

690659424 is an abundant number, since it is smaller than the sum of its proper divisors (1895519808).

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

690659424 is a wasteful number, since it uses less digits than its factorization.

690659424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147 (or 117 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 45.

The square root of 690659424 is about 26280.3999969559. The cubic root of 690659424 is about 883.9370019874.

The spelling of 690659424 in words is "six hundred ninety million, six hundred fifty-nine thousand, four hundred twenty-four".