81233746 has 16 divisors (see below), whose sum is σ = 138708288. Its totient is φ = 35318800.

The previous prime is 81233699. The next prime is 81233767. The reversal of 81233746 is 64733218.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79765 + ... + 80776.

It is an arithmetic number, because the mean of its divisors is an integer number (8669268).

Almost surely, 2^81233746 is an apocalyptic number.

81233746 is a deficient number, since it is larger than the sum of its proper divisors (57474542).

81233746 is a wasteful number, since it uses less digits than its factorization.

81233746 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160577.

The product of its digits is 24192, while the sum is 34.

The square root of 81233746 is about 9012.9765338649. The cubic root of 81233746 is about 433.0906689999.

The spelling of 81233746 in words is "eighty-one million, two hundred thirty-three thousand, seven hundred forty-six".