87729832 has 16 divisors (see below), whose sum is σ = 168506100. Its totient is φ = 42794880.

The previous prime is 87729799. The next prime is 87729839. The reversal of 87729832 is 23892778.

It can be written as a sum of positive squares in 2 ways, for example, as 71132356 + 16597476 = 8434^2 + 4074^2 .

It is not an unprimeable number, because it can be changed into a prime (87729839) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 133407 + ... + 134062.

Almost surely, 2^87729832 is an apocalyptic number.

87729832 is a gapful number since it is divisible by the number (82) formed by its first and last digit.

It is an amenable number.

87729832 is a deficient number, since it is larger than the sum of its proper divisors (80776268).

87729832 is a wasteful number, since it uses less digits than its factorization.

87729832 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267516 (or 267512 counting only the distinct ones).

The product of its digits is 338688, while the sum is 46.

The square root of 87729832 is about 9366.4204475349. The cubic root of 87729832 is about 444.3403634243.

The spelling of 87729832 in words is "eighty-seven million, seven hundred twenty-nine thousand, eight hundred thirty-two".