3081438720 has 320 divisors, whose sum is σ = 11072952000. Its totient is φ = 812187648.

The previous prime is 3081438707. The next prime is 3081438727. The reversal of 3081438720 is 278341803.

It is a tau number, because it is divible by the number of its divisors (320).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3081438727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7533876 + ... + 7534284.

It is an arithmetic number, because the mean of its divisors is an integer number (34602975).

Almost surely, 2^3081438720 is an apocalyptic number.

3081438720 is a gapful number since it is divisible by the number (30) 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 3081438720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5536476000).

3081438720 is an abundant number, since it is smaller than the sum of its proper divisors (7991513280).

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

3081438720 is a wasteful number, since it uses less digits than its factorization.

3081438720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 550 (or 528 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 3081438720 is about 55510.7081561747. The cubic root of 3081438720 is about 1455.1837795281.

The spelling of 3081438720 in words is "three billion, eighty-one million, four hundred thirty-eight thousand, seven hundred twenty".