699440 has 40 divisors (see below), whose sum is σ = 1860000. Its totient is φ = 239616.

The previous prime is 699437. The next prime is 699443. The reversal of 699440 is 44996.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (699437) and next prime (699443).

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

It is a junction number, because it is equal to n+sod(n) for n = 699397 and 699406.

It is not an unprimeable number, because it can be changed into a prime (699443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65 + ... + 1184.

It is an arithmetic number, because the mean of its divisors is an integer number (46500).

2⁶⁹⁹⁴⁴⁰ 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 699440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (930000).

699440 is an abundant number, since it is smaller than the sum of its proper divisors (1160560).

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

699440 is a wasteful number, since it uses less digits than its factorization.

699440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1269 (or 1263 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 699440 is about 836.3252955639. The cubic root of 699440 is about 88.7667164174.

The spelling of 699440 in words is "six hundred ninety-nine thousand, four hundred forty".