99987432 has 16 divisors (see below), whose sum is σ = 249968640. Its totient is φ = 33329136.

The previous prime is 99987373. The next prime is 99987449. The reversal of 99987432 is 23478999.

It is a nialpdrome in base 10.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2083048 + ... + 2083095.

It is an arithmetic number, because the mean of its divisors is an integer number (15623040).

Almost surely, 2^99987432 is an apocalyptic number.

It is an amenable number.

99987432 is an abundant number, since it is smaller than the sum of its proper divisors (149981208).

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

99987432 is a wasteful number, since it uses less digits than its factorization.

99987432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4166152 (or 4166148 counting only the distinct ones).

The product of its digits is 979776, while the sum is 51.

The square root of 99987432 is about 9999.3715802544. The cubic root of 99987432 is about 464.1394373838.

The spelling of 99987432 in words is "ninety-nine million, nine hundred eighty-seven thousand, four hundred thirty-two".