83518140 has 24 divisors (see below), whose sum is σ = 233850960. Its totient is φ = 22271488.

The previous prime is 83518087. The next prime is 83518147. The reversal of 83518140 is 4181538.

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 = 83518098 and 83518107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83518147) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 695925 + ... + 696044.

It is an arithmetic number, because the mean of its divisors is an integer number (9743790).

Almost surely, 2^83518140 is an apocalyptic number.

It is an amenable number.

83518140 is an abundant number, since it is smaller than the sum of its proper divisors (150332820).

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

83518140 is a wasteful number, since it uses less digits than its factorization.

83518140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1391981 (or 1391979 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 30.

The square root of 83518140 is about 9138.8259639847. The cubic root of 83518140 is about 437.1128809626.

Adding to 83518140 its reverse (4181538), we get a palindrome (87699678).

The spelling of 83518140 in words is "eighty-three million, five hundred eighteen thousand, one hundred forty".