7768428 has 24 divisors (see below), whose sum is σ = 18213888. Its totient is φ = 2576976.

The previous prime is 7768427. The next prime is 7768447. The reversal of 7768428 is 8248677.

It is a self number, because there is not a number n which added to its sum of digits gives 7768428.

It is not an unprimeable number, because it can be changed into a prime (7768427) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1225 + ... + 4127.

It is an arithmetic number, because the mean of its divisors is an integer number (758912).

Almost surely, 2^7768428 is an apocalyptic number.

It is an amenable number.

7768428 is an abundant number, since it is smaller than the sum of its proper divisors (10445460).

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

7768428 is a wasteful number, since it uses less digits than its factorization.

7768428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3133 (or 3131 counting only the distinct ones).

The product of its digits is 150528, while the sum is 42.

The square root of 7768428 is about 2787.1899827604. The cubic root of 7768428 is about 198.0513079971.

Subtracting 7768428 from its reverse (8248677), we obtain a square (480249 = 693²).

The spelling of 7768428 in words is "seven million, seven hundred sixty-eight thousand, four hundred twenty-eight".