7881144460 has 48 divisors (see below), whose sum is σ = 19020476160. Its totient is φ = 2687002560.

The previous prime is 7881144457. The next prime is 7881144473. The reversal of 7881144460 is 644411887.

It is a happy number.

It is a super-2 number, since 2×7881144460² (a number of 21 digits) contains 22 as substring.

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, 132186 + ... + 182305.

It is an arithmetic number, because the mean of its divisors is an integer number (396259920).

Almost surely, 2^7881144460 is an apocalyptic number.

7881144460 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

7881144460 is an abundant number, since it is smaller than the sum of its proper divisors (11139331700).

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

7881144460 is a wasteful number, since it uses less digits than its factorization.

7881144460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 314686 (or 314684 counting only the distinct ones).

The product of its (nonzero) digits is 172032, while the sum is 43.

The square root of 7881144460 is about 88775.8101061320. The cubic root of 7881144460 is about 1990.0459119227.

The spelling of 7881144460 in words is "seven billion, eight hundred eighty-one million, one hundred forty-four thousand, four hundred sixty".