71828818 has 4 divisors (see below), whose sum is σ = 107743230. Its totient is φ = 35914408.

The previous prime is 71828807. The next prime is 71828837. The reversal of 71828818 is 81882817.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 81882817 = 829 ⋅98773.

It can be written as a sum of positive squares in only one way, i.e., 44715969 + 27112849 = 6687^2 + 5207^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17957203 + ... + 17957206.

Almost surely, 2^71828818 is an apocalyptic number.

71828818 is a deficient number, since it is larger than the sum of its proper divisors (35914412).

71828818 is a wasteful number, since it uses less digits than its factorization.

71828818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35914411.

The product of its digits is 57344, while the sum is 43.

The square root of 71828818 is about 8475.1883754876. The cubic root of 71828818 is about 415.6868058387.

The spelling of 71828818 in words is "seventy-one million, eight hundred twenty-eight thousand, eight hundred eighteen".