8181626 has 4 divisors (see below), whose sum is σ = 12272442. Its totient is φ = 4090812.

The previous prime is 8181623. The next prime is 8181631. The reversal of 8181626 is 6261818.

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

It can be written as a sum of positive squares in only one way, i.e., 6076225 + 2105401 = 2465^2 + 1451^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 8181592 and 8181601.

It is not an unprimeable number, because it can be changed into a prime (8181623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2045405 + ... + 2045408.

Almost surely, 2^8181626 is an apocalyptic number.

8181626 is a deficient number, since it is larger than the sum of its proper divisors (4090816).

8181626 is a wasteful number, since it uses less digits than its factorization.

8181626 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4090815.

The product of its digits is 4608, while the sum is 32.

The square root of 8181626 is about 2860.3541738743. The cubic root of 8181626 is about 201.5022381516.

The spelling of 8181626 in words is "eight million, one hundred eighty-one thousand, six hundred twenty-six".