699980 has 24 divisors (see below), whose sum is σ = 1518720. Its totient is φ = 270720.

The previous prime is 699967. The next prime is 700001. The reversal of 699980 is 89996.

699980 = 135² + 136² + ... + 165².

699980 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56 + ... + 1184.

It is an arithmetic number, because the mean of its divisors is an integer number (63280).

2⁶⁹⁹⁹⁸⁰ 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 699980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (759360).

699980 is an abundant number, since it is smaller than the sum of its proper divisors (818740).

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

699980 is a wasteful number, since it uses less digits than its factorization.

699980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1169 (or 1167 counting only the distinct ones).

The product of its (nonzero) digits is 34992, while the sum is 41.

The square root of 699980 is about 836.6480741626. The cubic root of 699980 is about 88.7895545433.

The spelling of 699980 in words is "six hundred ninety-nine thousand, nine hundred eighty".