82399380 has 72 divisors (see below), whose sum is σ = 268396128. Its totient is φ = 18833472.

The previous prime is 82399379. The next prime is 82399399. The reversal of 82399380 is 8399328.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11074 + ... + 16953.

It is an arithmetic number, because the mean of its divisors is an integer number (3727724).

Almost surely, 2^82399380 is an apocalyptic number.

It is an amenable number.

82399380 is an abundant number, since it is smaller than the sum of its proper divisors (185996748).

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

82399380 is a wasteful number, since it uses less digits than its factorization.

82399380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28053 (or 28044 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 42.

The square root of 82399380 is about 9077.4104236836. The cubic root of 82399380 is about 435.1523313765.

The spelling of 82399380 in words is "eighty-two million, three hundred ninety-nine thousand, three hundred eighty".