7978428192 has 96 divisors (see below), whose sum is σ = 24118262784. Its totient is φ = 2262124800.

The previous prime is 7978428127. The next prime is 7978428197. The reversal of 7978428192 is 2918248797.

It is a tau number, because it is divible by the number of its divisors (96).

It is not an unprimeable number, because it can be changed into a prime (7978428197) 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, 42717 + ... + 133347.

It is an arithmetic number, because the mean of its divisors is an integer number (251231904).

Almost surely, 2^7978428192 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 7978428192, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12059131392).

7978428192 is an abundant number, since it is smaller than the sum of its proper divisors (16139834592).

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

7978428192 is a wasteful number, since it uses less digits than its factorization.

7978428192 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90782 (or 90774 counting only the distinct ones).

The product of its digits is 4064256, while the sum is 57.

The square root of 7978428192 is about 89322.0476254323. The cubic root of 7978428192 is about 1998.2007311345.

The spelling of 7978428192 in words is "seven billion, nine hundred seventy-eight million, four hundred twenty-eight thousand, one hundred ninety-two".