83219780 has 24 divisors (see below), whose sum is σ = 199727808. Its totient is φ = 28532448.

The previous prime is 83219761. The next prime is 83219783. The reversal of 83219780 is 8791238.

It is not an unprimeable number, because it can be changed into a prime (83219783) 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, 297074 + ... + 297353.

It is an arithmetic number, because the mean of its divisors is an integer number (8321992).

Almost surely, 2^83219780 is an apocalyptic number.

It is an amenable number.

83219780 is an abundant number, since it is smaller than the sum of its proper divisors (116508028).

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

83219780 is a wasteful number, since it uses less digits than its factorization.

83219780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 594443 (or 594441 counting only the distinct ones).

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

The square root of 83219780 is about 9122.4875993339. The cubic root of 83219780 is about 436.5917462384.

The spelling of 83219780 in words is "eighty-three million, two hundred nineteen thousand, seven hundred eighty".