1031940 has 180 divisors, whose sum is σ = 4055436. Its totient is φ = 217728.

The previous prime is 1031923. The next prime is 1031981. The reversal of 1031940 is 491301.

It can be written as a sum of positive squares in 2 ways, for example, as 254016 + 777924 = 504^2 + 882^2 .

It is a tau number, because it is divible by the number of its divisors (180).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 79374 + ... + 79386.

2^1031940 is an apocalyptic number.

1031940 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 1031940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2027718).

1031940 is an abundant number, since it is smaller than the sum of its proper divisors (3023496).

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

1031940 is a wasteful number, since it uses less digits than its factorization.

1031940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48 (or 30 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

The square root of 1031940 is about 1015.8444762856. The cubic root of 1031940 is about 101.0535284665.

The spelling of 1031940 in words is "one million, thirty-one thousand, nine hundred forty".