81238466 has 32 divisors (see below), whose sum is σ = 129330432. Its totient is φ = 38227840.

The previous prime is 81238459. The next prime is 81238477. The reversal of 81238466 is 66483218.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 412280 + ... + 412476.

It is an arithmetic number, because the mean of its divisors is an integer number (4041576).

Almost surely, 2^81238466 is an apocalyptic number.

81238466 is a deficient number, since it is larger than the sum of its proper divisors (48091966).

81238466 is a wasteful number, since it uses less digits than its factorization.

81238466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 394.

The product of its digits is 55296, while the sum is 38.

The square root of 81238466 is about 9013.2383747463. The cubic root of 81238466 is about 433.0990569276.

The spelling of 81238466 in words is "eighty-one million, two hundred thirty-eight thousand, four hundred sixty-six".