81267802 has 64 divisors (see below), whose sum is σ = 162570240. Its totient is φ = 29534400.

The previous prime is 81267793. The next prime is 81267817. The reversal of 81267802 is 20876218.

It is a super-2 number, since 2×81267802² = 13208911283822408, which contains 22 as substring.

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 31 ways as a sum of consecutive naturals, for example, 138153 + ... + 138739.

It is an arithmetic number, because the mean of its divisors is an integer number (2540160).

Almost surely, 2^81267802 is an apocalyptic number.

81267802 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

81267802 is a wasteful number, since it uses less digits than its factorization.

81267802 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 667.

The product of its (nonzero) digits is 10752, while the sum is 34.

The square root of 81267802 is about 9014.8656118658. The cubic root of 81267802 is about 433.1511827473.

The spelling of 81267802 in words is "eighty-one million, two hundred sixty-seven thousand, eight hundred two".