1040443380 has 132 divisors (see below), whose sum is σ = 3281098212. Its totient is φ = 277136640.

The previous prime is 1040443379. The next prime is 1040443399. The reversal of 1040443380 is 833440401.

It can be written as a sum of positive squares in 2 ways, for example, as 273042576 + 767400804 = 16524^2 + 27702^2 .

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 43 ways as a sum of consecutive naturals, for example, 1180540 + ... + 1181420.

Almost surely, 2^1040443380 is an apocalyptic number.

1040443380 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 1040443380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1640549106).

1040443380 is an abundant number, since it is smaller than the sum of its proper divisors (2240654832).

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

1040443380 is an frugal number, since it uses more digits than its factorization.

1040443380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 920 (or 891 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

The square root of 1040443380 is about 32255.9045757517. The cubic root of 1040443380 is about 1013.3033624080.

Adding to 1040443380 its reverse (833440401), we get a palindrome (1873883781).

The spelling of 1040443380 in words is "one billion, forty million, four hundred forty-three thousand, three hundred eighty".