1001873440 has 48 divisors (see below), whose sum is σ = 2448555480. Its totient is φ = 386928640.

The previous prime is 1001873429. The next prime is 1001873441. The reversal of 1001873440 is 443781001.

It can be written as a sum of positive squares in 4 ways, for example, as 989228304 + 12645136 = 31452^2 + 3556^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1001873399 and 1001873408.

It is not an unprimeable number, because it can be changed into a prime (1001873441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 103321 + ... + 112600.

Almost surely, 2^1001873440 is an apocalyptic number.

1001873440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1001873440 is an abundant number, since it is smaller than the sum of its proper divisors (1446682040).

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

1001873440 is a wasteful number, since it uses less digits than its factorization.

1001873440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215965 (or 215957 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 1001873440 is about 31652.3844283492. The cubic root of 1001873440 is about 1000.6240904301.

The spelling of 1001873440 in words is "one billion, one million, eight hundred seventy-three thousand, four hundred forty".