693864990 has 360 divisors, whose sum is σ = 2398888440. Its totient is φ = 138692736.

The previous prime is 693864967. The next prime is 693865001. The reversal of 693864990 is 99468396.

It is a happy number.

693864990 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 179 ways as a sum of consecutive naturals, for example, 36519201 + ... + 36519219.

It is an arithmetic number, because the mean of its divisors is an integer number (6663579).

Almost surely, 2^693864990 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 693864990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1199444220).

693864990 is an abundant number, since it is smaller than the sum of its proper divisors (1705023450).

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

693864990 is a wasteful number, since it uses less digits than its factorization.

693864990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86 (or 49 counting only the distinct ones).

The product of its (nonzero) digits is 2519424, while the sum is 54.

The square root of 693864990 is about 26341.3171652444. The cubic root of 693864990 is about 885.3024342213.

The spelling of 693864990 in words is "six hundred ninety-three million, eight hundred sixty-four thousand, nine hundred ninety".