8629778928 has 80 divisors (see below), whose sum is σ = 22423564800. Its totient is φ = 2859883008.

The previous prime is 8629778923. The next prime is 8629778939. The reversal of 8629778928 is 8298779268.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8629778923) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8226148 + ... + 8227196.

It is an arithmetic number, because the mean of its divisors is an integer number (280294560).

Almost surely, 2^8629778928 is an apocalyptic number.

It is an amenable number.

8629778928 is an abundant number, since it is smaller than the sum of its proper divisors (13793785872).

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

8629778928 is a wasteful number, since it uses less digits than its factorization.

8629778928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1894 (or 1888 counting only the distinct ones).

The product of its digits is 48771072, while the sum is 66.

The square root of 8629778928 is about 92896.6034255290. The cubic root of 8629778928 is about 2051.1616599081.

The spelling of 8629778928 in words is "eight billion, six hundred twenty-nine million, seven hundred seventy-eight thousand, nine hundred twenty-eight".