76778528 has 48 divisors (see below), whose sum is σ = 161595000. Its totient is φ = 35782656.

The previous prime is 76778501. The next prime is 76778539. The reversal of 76778528 is 82587767.

It can be written as a sum of positive squares in 4 ways, for example, as 51093904 + 25684624 = 7148^2 + 5068^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60848 + ... + 62096.

Almost surely, 2^76778528 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 76778528, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80797500).

76778528 is an abundant number, since it is smaller than the sum of its proper divisors (84816472).

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

76778528 is a wasteful number, since it uses less digits than its factorization.

76778528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1389 (or 1381 counting only the distinct ones).

The product of its digits is 1317120, while the sum is 50.

The square root of 76778528 is about 8762.3357616562. The cubic root of 76778528 is about 425.0238104307.

The spelling of 76778528 in words is "seventy-six million, seven hundred seventy-eight thousand, five hundred twenty-eight".