1999140 has 96 divisors (see below), whose sum is σ = 6604416. Its totient is φ = 445440.

The previous prime is 1999121. The next prime is 1999163. The reversal of 1999140 is 419991.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8464 + ... + 8696.

It is an arithmetic number, because the mean of its divisors is an integer number (68796).

2^1999140 is an apocalyptic number.

1999140 is a gapful number since it is divisible by the number (10) 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 1999140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3302208).

1999140 is an abundant number, since it is smaller than the sum of its proper divisors (4605276).

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

1999140 is a wasteful number, since it uses less digits than its factorization.

1999140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269 (or 267 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 33.

The square root of 1999140 is about 1413.9094737641. The cubic root of 1999140 is about 125.9740435320.

It can be divided in two parts, 199 and 9140, that added together give a palindrome (9339).

The spelling of 1999140 in words is "one million, nine hundred ninety-nine thousand, one hundred forty".