81467402 has 16 divisors (see below), whose sum is σ = 128831040. Its totient is φ = 38530368.

The previous prime is 81467381. The next prime is 81467429. The reversal of 81467402 is 20476418.

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, 32498 + ... + 34914.

It is an arithmetic number, because the mean of its divisors is an integer number (8051940).

Almost surely, 2^81467402 is an apocalyptic number.

81467402 is a deficient number, since it is larger than the sum of its proper divisors (47363638).

81467402 is a wasteful number, since it uses less digits than its factorization.

81467402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3325.

The product of its (nonzero) digits is 10752, while the sum is 32.

The square root of 81467402 is about 9025.9294258265. The cubic root of 81467402 is about 433.5055104092.

The spelling of 81467402 in words is "eighty-one million, four hundred sixty-seven thousand, four hundred two".