83866838 has 8 divisors (see below), whose sum is σ = 137236680. Its totient is φ = 38121280.

The previous prime is 83866837. The next prime is 83866843.

83866838 is nontrivially palindromic in base 10.

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

It is a super-2 number, since 2×83866838² = 14067293032236488, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83866837) 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, 1906043 + ... + 1906086.

It is an arithmetic number, because the mean of its divisors is an integer number (17154585).

Almost surely, 2^83866838 is an apocalyptic number.

83866838 is a deficient number, since it is larger than the sum of its proper divisors (53369842).

83866838 is a wasteful number, since it uses less digits than its factorization.

83866838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3812142.

The product of its digits is 1327104, while the sum is 50.

The square root of 83866838 is about 9157.8839258859. The cubic root of 83866838 is about 437.7203687639.

It can be divided in two parts, 838 and 66838, that added together give a palindrome (67676).

The spelling of 83866838 in words is "eighty-three million, eight hundred sixty-six thousand, eight hundred thirty-eight".