83820812 has 12 divisors (see below), whose sum is σ = 155315160. Its totient is φ = 39445056.

The previous prime is 83820811. The next prime is 83820827. The reversal of 83820812 is 21802838.

It is not an unprimeable number, because it can be changed into a prime (83820811) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 616262 + ... + 616397.

It is an arithmetic number, because the mean of its divisors is an integer number (12942930).

Almost surely, 2^83820812 is an apocalyptic number.

It is an amenable number.

83820812 is a deficient number, since it is larger than the sum of its proper divisors (71494348).

83820812 is a wasteful number, since it uses less digits than its factorization.

83820812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1232680 (or 1232678 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 32.

The square root of 83820812 is about 9155.3706642604. The cubic root of 83820812 is about 437.6402806752.

The spelling of 83820812 in words is "eighty-three million, eight hundred twenty thousand, eight hundred twelve".