7748920872 has 192 divisors, whose sum is σ = 27067996800. Its totient is φ = 1943262720.

The previous prime is 7748920871. The next prime is 7748920877. The reversal of 7748920872 is 2780298477.

7748920872 is a `hidden beast` number, since 77 + 489 + 20 + 8 + 72 = 666.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (7748920871) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 136678 + ... + 184874.

It is an arithmetic number, because the mean of its divisors is an integer number (140979150).

Almost surely, 2^7748920872 is an apocalyptic number.

7748920872 is a gapful number since it is divisible by the number (72) 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 7748920872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13533998400).

7748920872 is an abundant number, since it is smaller than the sum of its proper divisors (19319075928).

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

7748920872 is a wasteful number, since it uses less digits than its factorization.

7748920872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48256 (or 48249 counting only the distinct ones).

The product of its (nonzero) digits is 3161088, while the sum is 54.

The square root of 7748920872 is about 88027.9550597422. The cubic root of 7748920872 is about 1978.8539495733.

The spelling of 7748920872 in words is "seven billion, seven hundred forty-eight million, nine hundred twenty thousand, eight hundred seventy-two".