82018388 has 6 divisors (see below), whose sum is σ = 143532186. Its totient is φ = 41009192.

The previous prime is 82018373. The next prime is 82018393. The reversal of 82018388 is 88381028.

It can be written as a sum of positive squares in only one way, i.e., 54434884 + 27583504 = 7378^2 + 5252^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10252295 + ... + 10252302.

It is an arithmetic number, because the mean of its divisors is an integer number (23922031).

Almost surely, 2^82018388 is an apocalyptic number.

It is an amenable number.

82018388 is a deficient number, since it is larger than the sum of its proper divisors (61513798).

82018388 is a wasteful number, since it uses less digits than its factorization.

82018388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20504601 (or 20504599 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 38.

The square root of 82018388 is about 9056.4003886754. The cubic root of 82018388 is about 434.4806202659.

The spelling of 82018388 in words is "eighty-two million, eighteen thousand, three hundred eighty-eight".