7678238128 has 80 divisors (see below), whose sum is σ = 16816066560. Its totient is φ = 3364256000.

The previous prime is 7678238093. The next prime is 7678238137. The reversal of 7678238128 is 8218328767.

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, 5874051 + ... + 5875357.

It is an arithmetic number, because the mean of its divisors is an integer number (210200832).

Almost surely, 2^7678238128 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7678238128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8408033280).

7678238128 is an abundant number, since it is smaller than the sum of its proper divisors (9137828432).

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

7678238128 is a wasteful number, since it uses less digits than its factorization.

7678238128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2506 (or 2500 counting only the distinct ones).

The product of its digits is 1806336, while the sum is 52.

The square root of 7678238128 is about 87625.5563634263. The cubic root of 7678238128 is about 1972.8187746617.

The spelling of 7678238128 in words is "seven billion, six hundred seventy-eight million, two hundred thirty-eight thousand, one hundred twenty-eight".