82038781 has 8 divisors (see below), whose sum is σ = 89758944. Its totient is φ = 74362320.

The previous prime is 82038721. The next prime is 82038799. The reversal of 82038781 is 18783028.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 82038781 - 2⁷ = 82038653 is a prime.

It is a super-2 number, since 2×82038781² = 13460723175931922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 82038781.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82038721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6930 + ... + 14563.

It is an arithmetic number, because the mean of its divisors is an integer number (11219868).

Almost surely, 2^82038781 is an apocalyptic number.

It is an amenable number.

82038781 is a deficient number, since it is larger than the sum of its proper divisors (7720163).

82038781 is a wasteful number, since it uses less digits than its factorization.

82038781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21851.

The product of its (nonzero) digits is 21504, while the sum is 37.

The square root of 82038781 is about 9057.5262075249. The cubic root of 82038781 is about 434.5166269438.

It can be divided in two parts, 820 and 38781, that added together give a square (39601 = 199²).

The spelling of 82038781 in words is "eighty-two million, thirty-eight thousand, seven hundred eighty-one".