699720 has 128 divisors (see below), whose sum is σ = 2592000. Its totient is φ = 150528.

The previous prime is 699719. The next prime is 699733. The reversal of 699720 is 27996.

It is an Ulam number.

It is a Saint-Exupery number, since it is equal to the product of the sides of a Pythagorean triangle: 119 × 105 × 56.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 41152 + ... + 41168.

It is an arithmetic number, because the mean of its divisors is an integer number (20250).

2⁶⁹⁹⁷²⁰ is an apocalyptic number.

699720 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 699720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1296000).

699720 is an abundant number, since it is smaller than the sum of its proper divisors (1892280).

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

699720 is a wasteful number, since it uses less digits than its factorization.

699720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52 (or 34 counting only the distinct ones).

The product of its (nonzero) digits is 6804, while the sum is 33.

The square root of 699720 is about 836.4926777922. The cubic root of 699720 is about 88.7785598754.

The spelling of 699720 in words is "six hundred ninety-nine thousand, seven hundred twenty".