87433812 has 72 divisors (see below), whose sum is σ = 232668072. Its totient is φ = 27648000.

The previous prime is 87433799. The next prime is 87433813. The reversal of 87433812 is 21833478.

87433812 is nontrivially palindromic in base 11.

It can be written as a sum of positive squares in 4 ways, for example, as 36796356 + 50637456 = 6066^2 + 7116^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87433813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 53812 + ... + 55412.

It is an arithmetic number, because the mean of its divisors is an integer number (3231501).

Almost surely, 2^87433812 is an apocalyptic number.

87433812 is a gapful number since it is divisible by the number (82) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 87433812, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (116334036).

87433812 is an abundant number, since it is smaller than the sum of its proper divisors (145234260).

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

87433812 is a wasteful number, since it uses less digits than its factorization.

87433812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1689 (or 1684 counting only the distinct ones).

The product of its digits is 32256, while the sum is 36.

The square root of 87433812 is about 9350.6049002190. The cubic root of 87433812 is about 443.8400324627.

The spelling of 87433812 in words is "eighty-seven million, four hundred thirty-three thousand, eight hundred twelve".