1799940 has 48 divisors (see below), whose sum is σ = 5100480. Its totient is φ = 474240.

The previous prime is 1799929. The next prime is 1799951. The reversal of 1799940 is 499971.

It is an interprime number because it is at equal distance from previous prime (1799929) and next prime (1799951).

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 7746 + ... + 7974.

It is an arithmetic number, because the mean of its divisors is an integer number (106260).

2^1799940 is an apocalyptic number.

1799940 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 1799940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2550240).

1799940 is an abundant number, since it is smaller than the sum of its proper divisors (3300540).

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

1799940 is a wasteful number, since it uses less digits than its factorization.

With its successor (1799941) it forms a Ruth-Aaron pair, since the sum of their prime factors is the same (372).

1799940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 372 (or 370 counting only the distinct ones).

The product of its (nonzero) digits is 20412, while the sum is 39.

The square root of 1799940 is about 1341.6184256338. The cubic root of 1799940 is about 121.6426882960.

The spelling of 1799940 in words is "one million, seven hundred ninety-nine thousand, nine hundred forty".