1940040 has 96 divisors (see below), whose sum is σ = 6697080. Its totient is φ = 485376.

The previous prime is 1939999. The next prime is 1940041. The reversal of 1940040 is 400491.

It can be written as a sum of positive squares in 4 ways, for example, as 1340964 + 599076 = 1158^2 + 774^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a zygodrome in base 7.

It is a junction number, because it is equal to n+sod(n) for n = 1939995 and 1940022.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1940041) 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, 5962 + ... + 6278.

2^1940040 is an apocalyptic number.

1940040 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 1940040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3348540).

1940040 is an abundant number, since it is smaller than the sum of its proper divisors (4757040).

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

1940040 is a wasteful number, since it uses less digits than its factorization.

1940040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 351 (or 344 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 1940040 is about 1392.8531868076. The cubic root of 1940040 is about 124.7202276198.

The spelling of 1940040 in words is "one million, nine hundred forty thousand, forty".