8157996 has 144 divisors (see below), whose sum is σ = 26906880. Its totient is φ = 2099520.

The previous prime is 8157979. The next prime is 8158013. The reversal of 8157996 is 6997518.

It is an interprime number because it is at equal distance from previous prime (8157979) and next prime (8158013).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 74790 + ... + 74898.

Almost surely, 2^8157996 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 8157996, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13453440).

8157996 is an abundant number, since it is smaller than the sum of its proper divisors (18748884).

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

8157996 is a wasteful number, since it uses less digits than its factorization.

8157996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146 (or 132 counting only the distinct ones).

The product of its digits is 136080, while the sum is 45.

The square root of 8157996 is about 2856.2205797172. The cubic root of 8157996 is about 201.3080595830.

The spelling of 8157996 in words is "eight million, one hundred fifty-seven thousand, nine hundred ninety-six".