78771528 has 160 divisors (see below), whose sum is σ = 247246560. Its totient is φ = 23224320.

The previous prime is 78771503. The next prime is 78771533. The reversal of 78771528 is 82517787.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 306376 + ... + 306632.

It is an arithmetic number, because the mean of its divisors is an integer number (1545291).

Almost surely, 2^78771528 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 78771528, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (123623280).

78771528 is an abundant number, since it is smaller than the sum of its proper divisors (168475032).

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

78771528 is a wasteful number, since it uses less digits than its factorization.

78771528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 329 (or 316 counting only the distinct ones).

The product of its digits is 219520, while the sum is 45.

The square root of 78771528 is about 8875.3325571496. The cubic root of 78771528 is about 428.6699990416.

The spelling of 78771528 in words is "seventy-eight million, seven hundred seventy-one thousand, five hundred twenty-eight".