1940220 has 48 divisors (see below), whose sum is σ = 6037920. Its totient is φ = 517248.

The previous prime is 1940219. The next prime is 1940221. The reversal of 1940220 is 220491.

It is an interprime number because it is at equal distance from previous prime (1940219) and next prime (1940221).

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

It is a junction number, because it is equal to n+sod(n) for n = 1940193 and 1940202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1940221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1257 + ... + 2336.

It is an arithmetic number, because the mean of its divisors is an integer number (125790).

2^1940220 is an apocalyptic number.

1940220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1940220 is an abundant number, since it is smaller than the sum of its proper divisors (4097700).

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

1940220 is a wasteful number, since it uses less digits than its factorization.

1940220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3611 (or 3603 counting only the distinct ones).

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

The square root of 1940220 is about 1392.9178008770. The cubic root of 1940220 is about 124.7240847476.

The spelling of 1940220 in words is "one million, nine hundred forty thousand, two hundred twenty".