7928358978 has 32 divisors (see below), whose sum is σ = 16136860032. Its totient is φ = 2596204800.

The previous prime is 7928358967. The next prime is 7928358979. The reversal of 7928358978 is 8798538297.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (7928358979) 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, 288058 + ... + 314378.

It is an arithmetic number, because the mean of its divisors is an integer number (504276876).

Almost surely, 2^7928358978 is an apocalyptic number.

7928358978 is an abundant number, since it is smaller than the sum of its proper divisors (8208501054).

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

7928358978 is a wasteful number, since it uses less digits than its factorization.

7928358978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27210.

The product of its digits is 60963840, while the sum is 66.

The square root of 7928358978 is about 89041.3329751975. The cubic root of 7928358978 is about 1994.0120046815.

The spelling of 7928358978 in words is "seven billion, nine hundred twenty-eight million, three hundred fifty-eight thousand, nine hundred seventy-eight".