81498044 has 24 divisors (see below), whose sum is σ = 144372480. Its totient is φ = 40252464.

The previous prime is 81498031. The next prime is 81498071. The reversal of 81498044 is 44089418.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 81497989 and 81498007.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 155567 + ... + 156089.

It is an arithmetic number, because the mean of its divisors is an integer number (6015520).

Almost surely, 2^81498044 is an apocalyptic number.

It is an amenable number.

81498044 is a deficient number, since it is larger than the sum of its proper divisors (62874436).

81498044 is a wasteful number, since it uses less digits than its factorization.

81498044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 929 (or 927 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 38.

The square root of 81498044 is about 9027.6267091634. The cubic root of 81498044 is about 433.5598544800.

The spelling of 81498044 in words is "eighty-one million, four hundred ninety-eight thousand, forty-four".