5999640 has 96 divisors (see below), whose sum is σ = 19230480. Its totient is φ = 1497088.

The previous prime is 5999639. The next prime is 5999663. The reversal of 5999640 is 469995.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 5999592 and 5999601.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 34594 + ... + 34766.

Almost surely, 2^5999640 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 5999640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9615240).

5999640 is an abundant number, since it is smaller than the sum of its proper divisors (13230840).

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

5999640 is a wasteful number, since it uses less digits than its factorization.

5999640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221 (or 200 counting only the distinct ones).

The product of its (nonzero) digits is 87480, while the sum is 42.

The square root of 5999640 is about 2449.4162569886. The cubic root of 5999640 is about 181.7084249693.

It can be divided in two parts, 59 and 99640, that added together give a palindrome (99699).

The spelling of 5999640 in words is "five million, nine hundred ninety-nine thousand, six hundred forty".