1005041840 has 80 divisors (see below), whose sum is σ = 2557470240. Its totient is φ = 364277760.

The previous prime is 1005041837. The next prime is 1005041909. The reversal of 1005041840 is 481405001.

It is a tau number, because it is divible by the number of its divisors (80).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 294866 + ... + 298254.

It is an arithmetic number, because the mean of its divisors is an integer number (31968378).

Almost surely, 2^1005041840 is an apocalyptic number.

1005041840 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 1005041840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1278735120).

1005041840 is an abundant number, since it is smaller than the sum of its proper divisors (1552428400).

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

1005041840 is a wasteful number, since it uses less digits than its factorization.

1005041840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3750 (or 3744 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 23.

The square root of 1005041840 is about 31702.3948622182. The cubic root of 1005041840 is about 1001.6777967570.

Adding to 1005041840 its reverse (481405001), we get a palindrome (1486446841).

The spelling of 1005041840 in words is "one billion, five million, forty-one thousand, eight hundred forty".