81702852 has 48 divisors (see below), whose sum is σ = 237683712. Its totient is φ = 21221280.

The previous prime is 81702821. The next prime is 81702893. The reversal of 81702852 is 25820718.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43288 + ... + 45135.

It is an arithmetic number, because the mean of its divisors is an integer number (4951744).

Almost surely, 2^81702852 is an apocalyptic number.

It is an amenable number.

81702852 is an abundant number, since it is smaller than the sum of its proper divisors (155980860).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81702852 is a wasteful number, since it uses less digits than its factorization.

81702852 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88448 (or 88446 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 33.

The square root of 81702852 is about 9038.9629936182. The cubic root of 81702852 is about 433.9227353659.

The spelling of 81702852 in words is "eighty-one million, seven hundred two thousand, eight hundred fifty-two".