87812532 has 48 divisors (see below), whose sum is σ = 231537600. Its totient is φ = 28772640.

The previous prime is 87812521. The next prime is 87812533. The reversal of 87812532 is 23521878.

It is a super-2 number, since 2×87812532² = 15422081552502048, which contains 22 as substring.

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 (87812533) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 519 + ... + 13262.

It is an arithmetic number, because the mean of its divisors is an integer number (4823700).

Almost surely, 2^87812532 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 87812532, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (115768800).

87812532 is an abundant number, since it is smaller than the sum of its proper divisors (143725068).

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

87812532 is a wasteful number, since it uses less digits than its factorization.

87812532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13853 (or 13845 counting only the distinct ones).

The product of its digits is 26880, while the sum is 36.

The square root of 87812532 is about 9370.8341144212. The cubic root of 87812532 is about 444.4799412112.

The spelling of 87812532 in words is "eighty-seven million, eight hundred twelve thousand, five hundred thirty-two".