3599820 has 72 divisors (see below), whose sum is σ = 12483744. Its totient is φ = 822528.

The previous prime is 3599779. The next prime is 3599821. The reversal of 3599820 is 289953.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (3599821) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 169 + ... + 2688.

Almost surely, 2^3599820 is an apocalyptic number.

3599820 is a gapful number since it is divisible by the number (30) 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 3599820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6241872).

3599820 is an abundant number, since it is smaller than the sum of its proper divisors (8883924).

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

3599820 is a wasteful number, since it uses less digits than its factorization.

3599820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2879 (or 2874 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 36.

The square root of 3599820 is about 1897.3191613432. The cubic root of 3599820 is about 153.2593320714.

The spelling of 3599820 in words is "three million, five hundred ninety-nine thousand, eight hundred twenty".