83439405 has 72 divisors (see below), whose sum is σ = 170726400. Its totient is φ = 37582272.

The previous prime is 83439359. The next prime is 83439407. The reversal of 83439405 is 50493438.

It is not a de Polignac number, because 83439405 - 2⁹ = 83438893 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 83439405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83439407) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 173956 + ... + 174434.

It is an arithmetic number, because the mean of its divisors is an integer number (2371200).

Almost surely, 2^83439405 is an apocalyptic number.

It is an amenable number.

83439405 is an abundant number, since it is smaller than the sum of its proper divisors (87286995).

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

83439405 is a wasteful number, since it uses less digits than its factorization.

83439405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 583 (or 573 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The square root of 83439405 is about 9134.5172286224. The cubic root of 83439405 is about 436.9754780648.

The spelling of 83439405 in words is "eighty-three million, four hundred thirty-nine thousand, four hundred five".