78339528 has 64 divisors (see below), whose sum is σ = 219912000. Its totient is φ = 25837056.

The previous prime is 78339497. The next prime is 78339557. The reversal of 78339528 is 82593387.

It is a super-2 number, since 2×78339528² = 12274163294525568, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19083 + ... + 22821.

It is an arithmetic number, because the mean of its divisors is an integer number (3436125).

Almost surely, 2^78339528 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 78339528, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (109956000).

78339528 is an abundant number, since it is smaller than the sum of its proper divisors (141572472).

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

78339528 is a wasteful number, since it uses less digits than its factorization.

78339528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3851 (or 3841 counting only the distinct ones).

The product of its digits is 362880, while the sum is 45.

The square root of 78339528 is about 8850.9619816153. The cubic root of 78339528 is about 427.8849226238.

The spelling of 78339528 in words is "seventy-eight million, three hundred thirty-nine thousand, five hundred twenty-eight".