83471778 has 96 divisors (see below), whose sum is σ = 207148032. Its totient is φ = 24105600.

The previous prime is 83471723. The next prime is 83471797. The reversal of 83471778 is 87717438.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 268243 + ... + 268553.

It is an arithmetic number, because the mean of its divisors is an integer number (2157792).

Almost surely, 2^83471778 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 83471778, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (103574016).

83471778 is an abundant number, since it is smaller than the sum of its proper divisors (123676254).

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

83471778 is a wasteful number, since it uses less digits than its factorization.

83471778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 400 (or 397 counting only the distinct ones).

The product of its digits is 263424, while the sum is 45.

The square root of 83471778 is about 9136.2890716089. The cubic root of 83471778 is about 437.0319836533.

The spelling of 83471778 in words is "eighty-three million, four hundred seventy-one thousand, seven hundred seventy-eight".