83572780 has 48 divisors (see below), whose sum is σ = 183708000. Its totient is φ = 31894016.

The previous prime is 83572763. The next prime is 83572787. The reversal of 83572780 is 8727538.

It is not an unprimeable number, because it can be changed into a prime (83572787) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50811 + ... + 52429.

It is an arithmetic number, because the mean of its divisors is an integer number (3827250).

Almost surely, 2^83572780 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 83572780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91854000).

83572780 is an abundant number, since it is smaller than the sum of its proper divisors (100135220).

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

83572780 is a wasteful number, since it uses less digits than its factorization.

83572780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1746 (or 1744 counting only the distinct ones).

The product of its (nonzero) digits is 94080, while the sum is 40.

The square root of 83572780 is about 9141.8149182753. The cubic root of 83572780 is about 437.2081841754.

The spelling of 83572780 in words is "eighty-three million, five hundred seventy-two thousand, seven hundred eighty".