81802062 has 48 divisors (see below), whose sum is σ = 194633712. Its totient is φ = 25660800.

The previous prime is 81802057. The next prime is 81802103. The reversal of 81802062 is 26020818.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3312 + ... + 13212.

It is an arithmetic number, because the mean of its divisors is an integer number (4054869).

Almost surely, 2^81802062 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 81802062, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (97316856).

81802062 is an abundant number, since it is smaller than the sum of its proper divisors (112831650).

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

81802062 is a wasteful number, since it uses less digits than its factorization.

81802062 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9935 (or 9923 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 27.

The square root of 81802062 is about 9044.4492369630. The cubic root of 81802062 is about 434.0982986443.

The spelling of 81802062 in words is "eighty-one million, eight hundred two thousand, sixty-two".