81307362 has 16 divisors (see below), whose sum is σ = 172180512. Its totient is φ = 25508160.

The previous prime is 81307337. The next prime is 81307399. The reversal of 81307362 is 26370318.

It is a super-2 number, since 2×81307362² = 13221774230798088, which contains 22 as substring.

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, 398464 + ... + 398667.

It is an arithmetic number, because the mean of its divisors is an integer number (10761282).

Almost surely, 2^81307362 is an apocalyptic number.

81307362 is an abundant number, since it is smaller than the sum of its proper divisors (90873150).

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

81307362 is a wasteful number, since it uses less digits than its factorization.

81307362 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 797153.

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 81307362 is about 9017.0594985283. The cubic root of 81307362 is about 433.2214552730.

The spelling of 81307362 in words is "eighty-one million, three hundred seven thousand, three hundred sixty-two".