87421432 has 32 divisors (see below), whose sum is σ = 197193600. Its totient is φ = 35493984.

The previous prime is 87421423. The next prime is 87421447. The reversal of 87421432 is 23412478.

It is a junction number, because it is equal to n+sod(n) for n = 87421394 and 87421403.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40018 + ... + 42145.

It is an arithmetic number, because the mean of its divisors is an integer number (6162300).

Almost surely, 2^87421432 is an apocalyptic number.

It is an amenable number.

87421432 is an abundant number, since it is smaller than the sum of its proper divisors (109772168).

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

87421432 is a wasteful number, since it uses less digits than its factorization.

87421432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82195 (or 82191 counting only the distinct ones).

The product of its digits is 10752, while the sum is 31.

The square root of 87421432 is about 9349.9428875261. The cubic root of 87421432 is about 443.8190832867.

The spelling of 87421432 in words is "eighty-seven million, four hundred twenty-one thousand, four hundred thirty-two".