83190840 has 32 divisors (see below), whose sum is σ = 249572880. Its totient is φ = 22184192.

The previous prime is 83190823. The next prime is 83190841. The reversal of 83190840 is 4809138.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83190841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 346509 + ... + 346748.

Almost surely, 2^83190840 is an apocalyptic number.

It is an amenable number.

83190840 is an abundant number, since it is smaller than the sum of its proper divisors (166382040).

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

83190840 is a wasteful number, since it uses less digits than its factorization.

83190840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 693271 (or 693267 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 83190840 is about 9120.9012712560. The cubic root of 83190840 is about 436.5411315486.

Adding to 83190840 its reverse (4809138), we get a palindrome (87999978).

The spelling of 83190840 in words is "eighty-three million, one hundred ninety thousand, eight hundred forty".