81484732 has 12 divisors (see below), whose sum is σ = 162969520. Its totient is φ = 34922016.

The previous prime is 81484721. The next prime is 81484747. The reversal of 81484732 is 23748418.

81484732 is an admirable number.

It is a super-2 number, since 2×81484732² = 13279523098223648, which contains 22 as substring.

It is a hoax number, since the sum of its digits (37) 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 = 81484691 and 81484700.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1455057 + ... + 1455112.

Almost surely, 2^81484732 is an apocalyptic number.

It is an amenable number.

81484732 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

81484732 is a wasteful number, since it uses less digits than its factorization.

81484732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2910180 (or 2910178 counting only the distinct ones).

The product of its digits is 43008, while the sum is 37.

The square root of 81484732 is about 9026.8893867157. The cubic root of 81484732 is about 433.5362471116.

It can be divided in two parts, 8148 and 4732, that added together give a triangular number (12880 = T₁₆₀).

The spelling of 81484732 in words is "eighty-one million, four hundred eighty-four thousand, seven hundred thirty-two".