83277720 has 80 divisors (see below), whose sum is σ = 279916560. Its totient is φ = 22206528.

The previous prime is 83277709. The next prime is 83277721. The reversal of 83277720 is 2777238.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83277721) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 9612 + ... + 16091.

It is an arithmetic number, because the mean of its divisors is an integer number (3498957).

Almost surely, 2^83277720 is an apocalyptic number.

It is an amenable number.

83277720 is an abundant number, since it is smaller than the sum of its proper divisors (196638840).

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

83277720 is a wasteful number, since it uses less digits than its factorization.

83277720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25726 (or 25713 counting only the distinct ones).

The product of its (nonzero) digits is 32928, while the sum is 36.

The square root of 83277720 is about 9125.6627156607. The cubic root of 83277720 is about 436.6930453022.

The spelling of 83277720 in words is "eighty-three million, two hundred seventy-seven thousand, seven hundred twenty".