81898046 has 8 divisors (see below), whose sum is σ = 123601224. Its totient is φ = 40697640.

The previous prime is 81898031. The next prime is 81898073. The reversal of 81898046 is 64089818.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 81897988 and 81898006.

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, 125285 + ... + 125936.

It is an arithmetic number, because the mean of its divisors is an integer number (15450153).

Almost surely, 2^81898046 is an apocalyptic number.

81898046 is a deficient number, since it is larger than the sum of its proper divisors (41703178).

81898046 is a wasteful number, since it uses less digits than its factorization.

81898046 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251386.

The product of its (nonzero) digits is 110592, while the sum is 44.

The square root of 81898046 is about 9049.7539193063. The cubic root of 81898046 is about 434.2680181027.

The spelling of 81898046 in words is "eighty-one million, eight hundred ninety-eight thousand, forty-six".