81862852 has 12 divisors (see below), whose sum is σ = 143675280. Its totient is φ = 40812776.

The previous prime is 81862831. The next prime is 81862873. The reversal of 81862852 is 25826818.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (81862831) and next prime (81862873).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28102 + ... + 30877.

It is an arithmetic number, because the mean of its divisors is an integer number (11972940).

Almost surely, 2^81862852 is an apocalyptic number.

It is an amenable number.

81862852 is a deficient number, since it is larger than the sum of its proper divisors (61812428).

81862852 is a wasteful number, since it uses less digits than its factorization.

81862852 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59330 (or 59328 counting only the distinct ones).

The product of its digits is 61440, while the sum is 40.

The square root of 81862852 is about 9047.8092376000. The cubic root of 81862852 is about 434.2058032752.

The spelling of 81862852 in words is "eighty-one million, eight hundred sixty-two thousand, eight hundred fifty-two".