81884702 has 8 divisors (see below), whose sum is σ = 126789312. Its totient is φ = 39621600.

The previous prime is 81884657. The next prime is 81884711. The reversal of 81884702 is 20748818.

It is a happy number.

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

It is a congruent number.

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, 660299 + ... + 660422.

It is an arithmetic number, because the mean of its divisors is an integer number (15848664).

Almost surely, 2^81884702 is an apocalyptic number.

81884702 is a deficient number, since it is larger than the sum of its proper divisors (44904610).

81884702 is a wasteful number, since it uses less digits than its factorization.

81884702 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1320754.

The product of its (nonzero) digits is 28672, while the sum is 38.

The square root of 81884702 is about 9049.0166316567. The cubic root of 81884702 is about 434.2444311045.

The spelling of 81884702 in words is "eighty-one million, eight hundred eighty-four thousand, seven hundred two".