699920 has 40 divisors (see below), whose sum is σ = 1755096. Its totient is φ = 258048.

The previous prime is 699863. The next prime is 699931. The reversal of 699920 is 29996.

It can be written as a sum of positive squares in 4 ways, for example, as 1024 + 698896 = 32^2 + 836^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 699920.

It is an unprimeable number.

699920 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 704 + ... + 1376.

2⁶⁹⁹⁹²⁰ 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 699920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (877548).

699920 is an abundant number, since it is smaller than the sum of its proper divisors (1055176).

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

699920 is a wasteful number, since it uses less digits than its factorization.

699920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 699 (or 693 counting only the distinct ones).

The product of its (nonzero) digits is 8748, while the sum is 35.

The square root of 699920 is about 836.6122160236. The cubic root of 699920 is about 88.7870175540.

The spelling of 699920 in words is "six hundred ninety-nine thousand, nine hundred twenty".