82123784 has 32 divisors (see below), whose sum is σ = 156530880. Its totient is φ = 40388544.

The previous prime is 82123781. The next prime is 82123813. The reversal of 82123784 is 48732128.

It is not an unprimeable number, because it can be changed into a prime (82123781) 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, 168389 + ... + 168875.

It is an arithmetic number, because the mean of its divisors is an integer number (4891590).

Almost surely, 2^82123784 is an apocalyptic number.

It is an amenable number.

82123784 is a deficient number, since it is larger than the sum of its proper divisors (74407096).

82123784 is a wasteful number, since it uses less digits than its factorization.

82123784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 797 (or 793 counting only the distinct ones).

The product of its digits is 21504, while the sum is 35.

The square root of 82123784 is about 9062.2173886969. The cubic root of 82123784 is about 434.6666473250. Note that the first 4 decimals are identical.

The spelling of 82123784 in words is "eighty-two million, one hundred twenty-three thousand, seven hundred eighty-four".