78528828 has 96 divisors (see below), whose sum is σ = 220631040. Its totient is φ = 21265920.

The previous prime is 78528787. The next prime is 78528829. The reversal of 78528828 is 82882587.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78528829) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 137728 + ... + 138296.

It is an arithmetic number, because the mean of its divisors is an integer number (2298240).

Almost surely, 2^78528828 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 78528828, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (110315520).

78528828 is an abundant number, since it is smaller than the sum of its proper divisors (142102212).

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

78528828 is a wasteful number, since it uses less digits than its factorization.

78528828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 667 (or 665 counting only the distinct ones).

The product of its digits is 573440, while the sum is 48.

The square root of 78528828 is about 8861.6492821596. The cubic root of 78528828 is about 428.2292930992.

It can be divided in two parts, 78 and 528828, that added together give a triangular number (528906 = T₁₀₂₈).

The spelling of 78528828 in words is "seventy-eight million, five hundred twenty-eight thousand, eight hundred twenty-eight".