83538780 has 48 divisors (see below), whose sum is σ = 251903904. Its totient is φ = 20563200.

The previous prime is 83538779. The next prime is 83538803. The reversal of 83538780 is 8783538.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52771 + ... + 54330.

It is an arithmetic number, because the mean of its divisors is an integer number (5247998).

Almost surely, 2^83538780 is an apocalyptic number.

It is an amenable number.

83538780 is an abundant number, since it is smaller than the sum of its proper divisors (168365124).

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

83538780 is a wasteful number, since it uses less digits than its factorization.

83538780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107126 (or 107124 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 42.

The square root of 83538780 is about 9139.9551421219. The cubic root of 83538780 is about 437.1488861816.

The spelling of 83538780 in words is "eighty-three million, five hundred thirty-eight thousand, seven hundred eighty".