5427798978 has 48 divisors (see below), whose sum is σ = 12840287040. Its totient is φ = 1496614560.

The previous prime is 5427798973. The next prime is 5427798979. The reversal of 5427798978 is 8798977245.

It is a super-2 number, since 2×5427798978² = 58922003491155688968, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (5427798973) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2570143 + ... + 2572253.

It is an arithmetic number, because the mean of its divisors is an integer number (267505980).

Almost surely, 2^5427798978 is an apocalyptic number.

5427798978 is a gapful number since it is divisible by the number (58) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 5427798978, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6420143520).

5427798978 is an abundant number, since it is smaller than the sum of its proper divisors (7412488062).

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

5427798978 is an equidigital number, since it uses as much as digits as its factorization.

5427798978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4263 (or 2152 counting only the distinct ones).

The product of its digits is 71124480, while the sum is 66.

The square root of 5427798978 is about 73673.5975638492. The cubic root of 5427798978 is about 1757.4160362200.

The spelling of 5427798978 in words is "five billion, four hundred twenty-seven million, seven hundred ninety-eight thousand, nine hundred seventy-eight".