83721204 has 108 divisors (see below), whose sum is σ = 254287488. Its totient is φ = 23133600.

The previous prime is 83721203. The next prime is 83721217. The reversal of 83721204 is 40212738.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83721203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 53919 + ... + 55449.

Almost surely, 2^83721204 is an apocalyptic number.

83721204 is a gapful number since it is divisible by the number (84) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 83721204, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (127143744).

83721204 is an abundant number, since it is smaller than the sum of its proper divisors (170566284).

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

83721204 is a wasteful number, since it uses less digits than its factorization.

83721204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1586 (or 1574 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 83721204 is about 9149.9291800538. The cubic root of 83721204 is about 437.4668561558.

The spelling of 83721204 in words is "eighty-three million, seven hundred twenty-one thousand, two hundred four".