76521320 has 32 divisors (see below), whose sum is σ = 172519200. Its totient is φ = 30547008.

The previous prime is 76521287. The next prime is 76521331. The reversal of 76521320 is 2312567.

It is a self number, because there is not a number n which added to its sum of digits gives 76521320.

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, 21851 + ... + 25109.

It is an arithmetic number, because the mean of its divisors is an integer number (5391225).

Almost surely, 2^76521320 is an apocalyptic number.

It is an amenable number.

76521320 is an abundant number, since it is smaller than the sum of its proper divisors (95997880).

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

76521320 is a wasteful number, since it uses less digits than its factorization.

76521320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3857 (or 3853 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 26.

The square root of 76521320 is about 8747.6465406417. The cubic root of 76521320 is about 424.5486696667.

Adding to 76521320 its reverse (2312567), we get a palindrome (78833887).

The spelling of 76521320 in words is "seventy-six million, five hundred twenty-one thousand, three hundred twenty".