699540 has 48 divisors (see below), whose sum is σ = 1995840. Its totient is φ = 183040.

The previous prime is 699539. The next prime is 699541. The reversal of 699540 is 45996.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (699539) and next prime (699541).

It is a nialpdrome in base 15.

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 699540.

It is not an unprimeable number, because it can be changed into a prime (699541) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5275 + ... + 5405.

It is an arithmetic number, because the mean of its divisors is an integer number (41580).

2⁶⁹⁹⁵⁴⁰ is an apocalyptic number.

699540 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 699540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (997920).

699540 is an abundant number, since it is smaller than the sum of its proper divisors (1296300).

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

699540 is a wasteful number, since it uses less digits than its factorization.

699540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232 (or 230 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 33.

The square root of 699540 is about 836.3850787765. The cubic root of 699540 is about 88.7709465866.

The spelling of 699540 in words is "six hundred ninety-nine thousand, five hundred forty".