83398440 has 32 divisors (see below), whose sum is σ = 250195680. Its totient is φ = 22239552.

The previous prime is 83398439. The next prime is 83398453. The reversal of 83398440 is 4489338.

It is an unprimeable number.

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, 347374 + ... + 347613.

It is an arithmetic number, because the mean of its divisors is an integer number (7818615).

Almost surely, 2^83398440 is an apocalyptic number.

It is an amenable number.

83398440 is an abundant number, since it is smaller than the sum of its proper divisors (166797240).

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

83398440 is a wasteful number, since it uses less digits than its factorization.

83398440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 695001 (or 694997 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 39.

The square root of 83398440 is about 9132.2746345037. The cubic root of 83398440 is about 436.9039545812.

It can be divided in two parts, 83398 and 440, that added together give a palindrome (83838).

The spelling of 83398440 in words is "eighty-three million, three hundred ninety-eight thousand, four hundred forty".