81274360 has 32 divisors (see below), whose sum is σ = 184761360. Its totient is φ = 32173056.

The previous prime is 81274351. The next prime is 81274373. The reversal of 81274360 is 6347218.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6594 + ... + 14353.

Almost surely, 2^81274360 is an apocalyptic number.

It is an amenable number.

81274360 is an abundant number, since it is smaller than the sum of its proper divisors (103487000).

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

81274360 is a wasteful number, since it uses less digits than its factorization.

81274360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21055 (or 21051 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 81274360 is about 9015.2293370718. The cubic root of 81274360 is about 433.1628336471.

The spelling of 81274360 in words is "eighty-one million, two hundred seventy-four thousand, three hundred sixty".