8157980 has 12 divisors (see below), whose sum is σ = 17131800. Its totient is φ = 3263184.

The previous prime is 8157979. The next prime is 8158013. The reversal of 8157980 is 897518.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 203930 + ... + 203969.

It is an arithmetic number, because the mean of its divisors is an integer number (1427650).

Almost surely, 2^8157980 is an apocalyptic number.

It is an amenable number.

8157980 is an abundant number, since it is smaller than the sum of its proper divisors (8973820).

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

8157980 is a wasteful number, since it uses less digits than its factorization.

8157980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 407908 (or 407906 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 38.

The square root of 8157980 is about 2856.2177788117. The cubic root of 8157980 is about 201.3079279767.

The spelling of 8157980 in words is "eight million, one hundred fifty-seven thousand, nine hundred eighty".