81888602 has 8 divisors (see below), whose sum is σ = 128173536. Its totient is φ = 39164092.

The previous prime is 81888601. The next prime is 81888623. The reversal of 81888602 is 20688818.

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

It is a self number, because there is not a number n which added to its sum of digits gives 81888602.

It is not an unprimeable number, because it can be changed into a prime (81888601) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 890048 + ... + 890139.

It is an arithmetic number, because the mean of its divisors is an integer number (16021692).

Almost surely, 2^81888602 is an apocalyptic number.

81888602 is a deficient number, since it is larger than the sum of its proper divisors (46284934).

81888602 is a wasteful number, since it uses less digits than its factorization.

81888602 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1780212.

The product of its (nonzero) digits is 49152, while the sum is 41.

The square root of 81888602 is about 9049.2321221195. The cubic root of 81888602 is about 434.2513250516.

The spelling of 81888602 in words is "eighty-one million, eight hundred eighty-eight thousand, six hundred two".