83617140 has 24 divisors (see below), whose sum is σ = 234128160. Its totient is φ = 22297888.

The previous prime is 83617133. The next prime is 83617141. The reversal of 83617140 is 4171638.

It is a happy number.

It is a super-2 number, since 2×83617140² = 13983652203559200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 83617098 and 83617107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83617141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 696750 + ... + 696869.

It is an arithmetic number, because the mean of its divisors is an integer number (9755340).

Almost surely, 2^83617140 is an apocalyptic number.

It is an amenable number.

83617140 is an abundant number, since it is smaller than the sum of its proper divisors (150511020).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

83617140 is a wasteful number, since it uses less digits than its factorization.

83617140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1393631 (or 1393629 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 83617140 is about 9144.2408104774. The cubic root of 83617140 is about 437.2855264414.

Adding to 83617140 its reverse (4171638), we get a palindrome (87788778).

The spelling of 83617140 in words is "eighty-three million, six hundred seventeen thousand, one hundred forty".