1040389893840 has 320 divisors, whose sum is σ = 3726926318592. Its totient is φ = 237280665600.

The previous prime is 1040389893817. The next prime is 1040389893863. The reversal of 1040389893840 is 483989830401.

1040389893840 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (1040389893817) and next prime (1040389893863).

It is a super-2 number, since 2×1040389893840² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 201194455 + ... + 201199625.

Almost surely, 2^{1040389893840} is an apocalyptic number.

1040389893840 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 1040389893840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1863463159296).

1040389893840 is an abundant number, since it is smaller than the sum of its proper divisors (2686536424752).

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

1040389893840 is a wasteful number, since it uses less digits than its factorization.

1040389893840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9698 (or 9692 counting only the distinct ones).

The product of its (nonzero) digits is 5971968, while the sum is 57.

The spelling of 1040389893840 in words is "one trillion, forty billion, three hundred eighty-nine million, eight hundred ninety-three thousand, eight hundred forty".