81270672 has 40 divisors (see below), whose sum is σ = 239942976. Its totient is φ = 23220096.

The previous prime is 81270667. The next prime is 81270703. The reversal of 81270672 is 27607218.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 120603 + ... + 121274.

Almost surely, 2^81270672 is an apocalyptic number.

It is an amenable number.

81270672 is an abundant number, since it is smaller than the sum of its proper divisors (158672304).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81270672 is a wasteful number, since it uses less digits than its factorization.

81270672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241895 (or 241889 counting only the distinct ones).

The product of its (nonzero) digits is 9408, while the sum is 33.

The square root of 81270672 is about 9015.0247919792. The cubic root of 81270672 is about 433.1562816476.

The spelling of 81270672 in words is "eighty-one million, two hundred seventy thousand, six hundred seventy-two".