83411778 has 16 divisors (see below), whose sum is σ = 166953600. Its totient is φ = 27782256.

The previous prime is 83411773. The next prime is 83411791. The reversal of 83411778 is 87711438.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (83411773) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4248 + ... + 13596.

It is an arithmetic number, because the mean of its divisors is an integer number (10434600).

Almost surely, 2^83411778 is an apocalyptic number.

83411778 is an abundant number, since it is smaller than the sum of its proper divisors (83541822).

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

83411778 is a wasteful number, since it uses less digits than its factorization.

83411778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10841.

The product of its digits is 37632, while the sum is 39.

The square root of 83411778 is about 9133.0048724393. The cubic root of 83411778 is about 436.9272448423.

The spelling of 83411778 in words is "eighty-three million, four hundred eleven thousand, seven hundred seventy-eight".