81233464 has 32 divisors (see below), whose sum is σ = 168038640. Its totient is φ = 36576000.

The previous prime is 81233431. The next prime is 81233473. The reversal of 81233464 is 46433218.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors.

It is a congruent number.

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, 5262 + ... + 13789.

Almost surely, 2^81233464 is an apocalyptic number.

It is an amenable number.

81233464 is an abundant number, since it is smaller than the sum of its proper divisors (86805176).

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

81233464 is a wasteful number, since it uses less digits than its factorization.

81233464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19111 (or 19107 counting only the distinct ones).

The product of its digits is 13824, while the sum is 31.

The square root of 81233464 is about 9012.9608897410. The cubic root of 81233464 is about 433.0901678464.

The spelling of 81233464 in words is "eighty-one million, two hundred thirty-three thousand, four hundred sixty-four".