8478157 has 4 divisors (see below), whose sum is σ = 8532316. Its totient is φ = 8424000.

The previous prime is 8478149. The next prime is 8478163. The reversal of 8478157 is 7518748.

8478157 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2157961 + 6320196 = 1469^2 + 2514^2 .

It is a cyclic number.

It is not a de Polignac number, because 8478157 - 2³ = 8478149 is a prime.

It is a super-2 number, since 2×8478157² = 143758292233298, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8478137) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26844 + ... + 27157.

It is an arithmetic number, because the mean of its divisors is an integer number (2133079).

Almost surely, 2^8478157 is an apocalyptic number.

It is an amenable number.

8478157 is a deficient number, since it is larger than the sum of its proper divisors (54159).

8478157 is a wasteful number, since it uses less digits than its factorization.

8478157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54158.

The product of its digits is 62720, while the sum is 40.

The square root of 8478157 is about 2911.7274941175. The cubic root of 8478157 is about 203.9077902503.

The spelling of 8478157 in words is "eight million, four hundred seventy-eight thousand, one hundred fifty-seven".