7768881 has 12 divisors (see below), whose sum is σ = 11882052. Its totient is φ = 4874496.

The previous prime is 7768877. The next prime is 7768889. The reversal of 7768881 is 1888677.

7768881 is digitally balanced in base 3 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 6350400 + 1418481 = 2520^2 + 1191^2 .

It is not a de Polignac number, because 7768881 - 2² = 7768877 is a prime.

It is a super-2 number, since 2×7768881² = 120711023984322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (7768889) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25236 + ... + 25541.

It is an arithmetic number, because the mean of its divisors is an integer number (990171).

Almost surely, 2^7768881 is an apocalyptic number.

It is an amenable number.

7768881 is a deficient number, since it is larger than the sum of its proper divisors (4113171).

7768881 is a wasteful number, since it uses less digits than its factorization.

7768881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50800 (or 50797 counting only the distinct ones).

The product of its digits is 150528, while the sum is 45.

The square root of 7768881 is about 2787.2712462191. The cubic root of 7768881 is about 198.0551575747.

It can be divided in two parts, 7768 and 881, that added together give a square (8649 = 93²).

The spelling of 7768881 in words is "seven million, seven hundred sixty-eight thousand, eight hundred eighty-one".