7944951280 has 80 divisors (see below), whose sum is σ = 21130236864. Its totient is φ = 2721484800.

The previous prime is 7944951263. The next prime is 7944951307. The reversal of 7944951280 is 821594497.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

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, 666654 + ... + 678466.

Almost surely, 2^7944951280 is an apocalyptic number.

7944951280 is a gapful number since it is divisible by the number (70) 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 7944951280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10565118432).

7944951280 is an abundant number, since it is smaller than the sum of its proper divisors (13185285584).

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

7944951280 is a wasteful number, since it uses less digits than its factorization.

7944951280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13034 (or 13028 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 49.

The square root of 7944951280 is about 89134.4561883899. The cubic root of 7944951280 is about 1995.4020441683.

The spelling of 7944951280 in words is "seven billion, nine hundred forty-four million, nine hundred fifty-one thousand, two hundred eighty".