7768040440 has 32 divisors (see below), whose sum is σ = 17517584880. Its totient is φ = 3100195072.

The previous prime is 7768040431. The next prime is 7768040459. The reversal of 7768040440 is 440408677.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 7768040393 and 7768040402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 201469 + ... + 236908.

Almost surely, 2^7768040440 is an apocalyptic number.

It is an amenable number.

7768040440 is an abundant number, since it is smaller than the sum of its proper divisors (9749544440).

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

7768040440 is a wasteful number, since it uses less digits than its factorization.

7768040440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 438831 (or 438827 counting only the distinct ones).

The product of its (nonzero) digits is 150528, while the sum is 40.

The square root of 7768040440 is about 88136.4875633242. The cubic root of 7768040440 is about 1980.4801440747.

The spelling of 7768040440 in words is "seven billion, seven hundred sixty-eight million, forty thousand, four hundred forty".