81234774 has 12 divisors (see below), whose sum is σ = 176008716. Its totient is φ = 27078252.

The previous prime is 81234767. The next prime is 81234779. The reversal of 81234774 is 47743218.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81234779) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2256504 + ... + 2256539.

It is an arithmetic number, because the mean of its divisors is an integer number (14667393).

Almost surely, 2^81234774 is an apocalyptic number.

81234774 is an abundant number, since it is smaller than the sum of its proper divisors (94773942).

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

81234774 is a wasteful number, since it uses less digits than its factorization.

81234774 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4513051 (or 4513048 counting only the distinct ones).

The product of its digits is 37632, while the sum is 36.

The square root of 81234774 is about 9013.0335625693. The cubic root of 81234774 is about 433.0924958898.

The spelling of 81234774 in words is "eighty-one million, two hundred thirty-four thousand, seven hundred seventy-four".