8157473940 has 432 divisors, whose sum is σ = 30505458816. Its totient is φ = 1619735040.

The previous prime is 8157473923. The next prime is 8157473983. The reversal of 8157473940 is 493747518.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 8157473940.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 8181522 + ... + 8182518.

It is an arithmetic number, because the mean of its divisors is an integer number (70614488).

Almost surely, 2^8157473940 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 8157473940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15252729408).

8157473940 is an abundant number, since it is smaller than the sum of its proper divisors (22347984876).

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

8157473940 is a wasteful number, since it uses less digits than its factorization.

8157473940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1068 (or 1048 counting only the distinct ones).

The product of its (nonzero) digits is 846720, while the sum is 48.

The square root of 8157473940 is about 90318.7352657244. The cubic root of 8157473940 is about 2013.0376534508.

The spelling of 8157473940 in words is "eight billion, one hundred fifty-seven million, four hundred seventy-three thousand, nine hundred forty".