102439424 has 40 divisors (see below), whose sum is σ = 213602400. Its totient is φ = 48987136.

The previous prime is 102439417. The next prime is 102439483. The reversal of 102439424 is 424934201.

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, 7427 + ... + 16125.

It is an arithmetic number, because the mean of its divisors is an integer number (5340060).

Almost surely, 2^102439424 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 102439424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (106801200).

102439424 is an abundant number, since it is smaller than the sum of its proper divisors (111162976).

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

102439424 is an frugal number, since it uses more digits than its factorization.

102439424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8740 (or 8724 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 102439424 is about 10121.2362881221. The cubic root of 102439424 is about 467.9028702415.

The spelling of 102439424 in words is "one hundred two million, four hundred thirty-nine thousand, four hundred twenty-four".