87840432 has 60 divisors (see below), whose sum is σ = 246461904. Its totient is φ = 29205120.

The previous prime is 87840373. The next prime is 87840461. The reversal of 87840432 is 23404878.

It is a super-3 number, since 3×87840432³ (a number of 25 digits) contains 333 as substring.

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

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 106582 + ... + 107402.

Almost surely, 2^87840432 is an apocalyptic number.

It is an amenable number.

87840432 is an abundant number, since it is smaller than the sum of its proper divisors (158621472).

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

87840432 is a wasteful number, since it uses less digits than its factorization.

87840432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1578 (or 1569 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 36.

The square root of 87840432 is about 9372.3226576980. The cubic root of 87840432 is about 444.5270099570.

The spelling of 87840432 in words is "eighty-seven million, eight hundred forty thousand, four hundred thirty-two".