8781444372 has 12 divisors (see below), whose sum is σ = 20490036896. Its totient is φ = 2927148120.

The previous prime is 8781444349. The next prime is 8781444403. The reversal of 8781444372 is 2734441878.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×8781444372² (a number of 21 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 3 ways as a sum of consecutive naturals, for example, 365893504 + ... + 365893527.

Almost surely, 2^8781444372 is an apocalyptic number.

It is an amenable number.

8781444372 is an abundant number, since it is smaller than the sum of its proper divisors (11708592524).

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

8781444372 is a wasteful number, since it uses less digits than its factorization.

8781444372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 731787038 (or 731787036 counting only the distinct ones).

The product of its digits is 1204224, while the sum is 48.

The square root of 8781444372 is about 93709.3611759252. The cubic root of 8781444372 is about 2063.1081032837.

The spelling of 8781444372 in words is "eight billion, seven hundred eighty-one million, four hundred forty-four thousand, three hundred seventy-two".