8557138 has 8 divisors (see below), whose sum is σ = 13182732. Its totient is φ = 4162896.

The previous prime is 8557123. The next prime is 8557139. The reversal of 8557138 is 8317558.

It can be written as a sum of positive squares in 2 ways, for example, as 7469289 + 1087849 = 2733^2 + 1043^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×8557138² = 146449221502088, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a junction number, because it is equal to n+sod(n) for n = 8557097 and 8557106.

It is not an unprimeable number, because it can be changed into a prime (8557139) 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, 57745 + ... + 57892.

Almost surely, 2^8557138 is an apocalyptic number.

8557138 is a deficient number, since it is larger than the sum of its proper divisors (4625594).

8557138 is a wasteful number, since it uses less digits than its factorization.

8557138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115676.

The product of its digits is 33600, while the sum is 37.

The square root of 8557138 is about 2925.2586210453. The cubic root of 8557138 is about 204.5390236841.

The spelling of 8557138 in words is "eight million, five hundred fifty-seven thousand, one hundred thirty-eight".