5999940 has 96 divisors (see below), whose sum is σ = 19192320. Its totient is φ = 1555200.

The previous prime is 5999933. The next prime is 5999947. The reversal of 5999940 is 499995.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (5999933) and next prime (5999947).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5999947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 22005 + ... + 22275.

It is an arithmetic number, because the mean of its divisors is an integer number (199920).

Almost surely, 2^5999940 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 5999940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9596160).

5999940 is an abundant number, since it is smaller than the sum of its proper divisors (13192380).

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

5999940 is a wasteful number, since it uses less digits than its factorization.

5999940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 330 (or 322 counting only the distinct ones).

The product of its (nonzero) digits is 131220, while the sum is 45.

The square root of 5999940 is about 2449.4774953038. The cubic root of 5999940 is about 181.7114535743.

Subtracting from 5999940 its reverse (499995), we obtain a palindrome (5499945).

It can be divided in two parts, 59 and 99940, that added together give a palindrome (99999).

The spelling of 5999940 in words is "five million, nine hundred ninety-nine thousand, nine hundred forty".