8147309940 has 576 divisors, whose sum is σ = 32604364800. Its totient is φ = 1652555520.

The previous prime is 8147309939. The next prime is 8147309971. The reversal of 8147309940 is 499037418.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 21496671 + ... + 21497049.

It is an arithmetic number, because the mean of its divisors is an integer number (56604800).

Almost surely, 2^8147309940 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 8147309940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16302182400).

8147309940 is an abundant number, since it is smaller than the sum of its proper divisors (24457054860).

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

8147309940 is a wasteful number, since it uses less digits than its factorization.

8147309940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 473 (or 454 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The square root of 8147309940 is about 90262.4503323503. The cubic root of 8147309940 is about 2012.2012418155.

The spelling of 8147309940 in words is "eight billion, one hundred forty-seven million, three hundred nine thousand, nine hundred forty".