81960310 has 8 divisors (see below), whose sum is σ = 147528576. Its totient is φ = 32784120.

The previous prime is 81960299. The next prime is 81960323. The reversal of 81960310 is 1306918.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×81960310² = 13434984830592200, which contains 22 as substring.

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, 4098006 + ... + 4098025.

It is an arithmetic number, because the mean of its divisors is an integer number (18441072).

Almost surely, 2^81960310 is an apocalyptic number.

81960310 is a deficient number, since it is larger than the sum of its proper divisors (65568266).

81960310 is a wasteful number, since it uses less digits than its factorization.

81960310 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8196038.

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 81960310 is about 9053.1933592518. The cubic root of 81960310 is about 434.3780427646.

The spelling of 81960310 in words is "eighty-one million, nine hundred sixty thousand, three hundred ten".