81746232 has 32 divisors (see below), whose sum is σ = 213252480. Its totient is φ = 26063840.

The previous prime is 81746219. The next prime is 81746237. The reversal of 81746232 is 23264718.

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 81746193 and 81746202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81746237) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 73494 + ... + 74597.

It is an arithmetic number, because the mean of its divisors is an integer number (6664140).

Almost surely, 2^81746232 is an apocalyptic number.

It is an amenable number.

81746232 is an abundant number, since it is smaller than the sum of its proper divisors (131506248).

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

81746232 is a wasteful number, since it uses less digits than its factorization.

81746232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148123 (or 148119 counting only the distinct ones).

The product of its digits is 16128, while the sum is 33.

The square root of 81746232 is about 9041.3622867353. The cubic root of 81746232 is about 433.9995186415. Note that the first 3 decimals are identical.

The spelling of 81746232 in words is "eighty-one million, seven hundred forty-six thousand, two hundred thirty-two".