81404846 has 8 divisors (see below), whose sum is σ = 124705440. Its totient is φ = 39836368.

The previous prime is 81404833. The next prime is 81404881. The reversal of 81404846 is 64840418.

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, 432911 + ... + 433098.

It is an arithmetic number, because the mean of its divisors is an integer number (15588180).

Almost surely, 2^81404846 is an apocalyptic number.

81404846 is a deficient number, since it is larger than the sum of its proper divisors (43300594).

81404846 is a wasteful number, since it uses less digits than its factorization.

81404846 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 866058.

The product of its (nonzero) digits is 24576, while the sum is 35.

The square root of 81404846 is about 9022.4634108430. The cubic root of 81404846 is about 433.3945240348.

The spelling of 81404846 in words is "eighty-one million, four hundred four thousand, eight hundred forty-six".