8349978492 has 72 divisors (see below), whose sum is σ = 22029855120. Its totient is φ = 2664180480.

The previous prime is 8349978467. The next prime is 8349978493. The reversal of 8349978492 is 2948799438.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8349978493) 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, 24859 + ... + 131597.

It is an arithmetic number, because the mean of its divisors is an integer number (305970210).

Almost surely, 2^8349978492 is an apocalyptic number.

8349978492 is a gapful number since it is divisible by the number (82) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8349978492, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11014927560).

8349978492 is an abundant number, since it is smaller than the sum of its proper divisors (13679876628).

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

8349978492 is a wasteful number, since it uses less digits than its factorization.

8349978492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106843 (or 106838 counting only the distinct ones).

The product of its digits is 31352832, while the sum is 63.

The square root of 8349978492 is about 91378.2167258696. The cubic root of 8349978492 is about 2028.7496236744.

The spelling of 8349978492 in words is "eight billion, three hundred forty-nine million, nine hundred seventy-eight thousand, four hundred ninety-two".