83804840 has 64 divisors (see below), whose sum is σ = 216604800. Its totient is φ = 28585728.

The previous prime is 83804821. The next prime is 83804857. The reversal of 83804840 is 4840838.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 83804840.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63467 + ... + 64773.

It is an arithmetic number, because the mean of its divisors is an integer number (3384450).

Almost surely, 2^83804840 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 83804840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (108302400).

83804840 is an abundant number, since it is smaller than the sum of its proper divisors (132799960).

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

83804840 is a wasteful number, since it uses less digits than its factorization.

83804840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1554 (or 1550 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 35.

The square root of 83804840 is about 9154.4983478069. The cubic root of 83804840 is about 437.6124815546.

The spelling of 83804840 in words is "eighty-three million, eight hundred four thousand, eight hundred forty".