83812680 has 192 divisors, whose sum is σ = 315993600. Its totient is φ = 18869760.

The previous prime is 83812661. The next prime is 83812681. The reversal of 83812680 is 8621838.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (83812681) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 198870 + ... + 199290.

It is an arithmetic number, because the mean of its divisors is an integer number (1645800).

Almost surely, 2^83812680 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 83812680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (157996800).

83812680 is an abundant number, since it is smaller than the sum of its proper divisors (232180920).

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

83812680 is a wasteful number, since it uses less digits than its factorization.

83812680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 524 (or 517 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The square root of 83812680 is about 9154.9265425780. The cubic root of 83812680 is about 437.6261274446.

The spelling of 83812680 in words is "eighty-three million, eight hundred twelve thousand, six hundred eighty".