1940436 has 60 divisors (see below), whose sum is σ = 5214132. Its totient is φ = 628992.

The previous prime is 1940423. The next prime is 1940437. The reversal of 1940436 is 6340491.

It can be written as a sum of positive squares in 2 ways, for example, as 571536 + 1368900 = 756^2 + 1170^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1940437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 17116 + ... + 17228.

2^1940436 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 1940436, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2607066).

1940436 is an abundant number, since it is smaller than the sum of its proper divisors (3273696).

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

1940436 is a wasteful number, since it uses less digits than its factorization.

1940436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182 (or 171 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 1940436 is about 1392.9953338041. The cubic root of 1940436 is about 124.7287129861.

The spelling of 1940436 in words is "one million, nine hundred forty thousand, four hundred thirty-six".