81338302 has 8 divisors (see below), whose sum is σ = 129184416. Its totient is φ = 38276832.

The previous prime is 81338291. The next prime is 81338303. The reversal of 81338302 is 20383318.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81338303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1196118 + ... + 1196185.

It is an arithmetic number, because the mean of its divisors is an integer number (16148052).

Almost surely, 2^81338302 is an apocalyptic number.

81338302 is a deficient number, since it is larger than the sum of its proper divisors (47846114).

81338302 is a wasteful number, since it uses less digits than its factorization.

81338302 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2392322.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 81338302 is about 9018.7749722454. The cubic root of 81338302 is about 433.2763997522.

The spelling of 81338302 in words is "eighty-one million, three hundred thirty-eight thousand, three hundred two".