81238204 has 6 divisors (see below), whose sum is σ = 142166864. Its totient is φ = 40619100.

The previous prime is 81238163. The next prime is 81238229. The reversal of 81238204 is 40283218.

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, 10154772 + ... + 10154779.

Almost surely, 2^81238204 is an apocalyptic number.

It is an amenable number.

81238204 is a deficient number, since it is larger than the sum of its proper divisors (60928660).

81238204 is a wasteful number, since it uses less digits than its factorization.

81238204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20309555 (or 20309553 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 28.

The square root of 81238204 is about 9013.2238405578. The cubic root of 81238204 is about 433.0985913350.

The spelling of 81238204 in words is "eighty-one million, two hundred thirty-eight thousand, two hundred four".