83819720 has 16 divisors (see below), whose sum is σ = 188594460. Its totient is φ = 33527872.

The previous prime is 83819719. The next prime is 83819767. The reversal of 83819720 is 2791838.

It can be written as a sum of positive squares in 2 ways, for example, as 79316836 + 4502884 = 8906^2 + 2122^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1047707 + ... + 1047786.

Almost surely, 2^83819720 is an apocalyptic number.

It is an amenable number.

83819720 is an abundant number, since it is smaller than the sum of its proper divisors (104774740).

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

83819720 is a wasteful number, since it uses less digits than its factorization.

83819720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2095504 (or 2095500 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 38.

The square root of 83819720 is about 9155.3110269395. The cubic root of 83819720 is about 437.6383801717.

The spelling of 83819720 in words is "eighty-three million, eight hundred nineteen thousand, seven hundred twenty".