76521040 has 20 divisors (see below), whose sum is σ = 177911604. Its totient is φ = 30608384.

The previous prime is 76520993. The next prime is 76521041. The reversal of 76521040 is 4012567.

It can be written as a sum of positive squares in 2 ways, for example, as 29680704 + 46840336 = 5448^2 + 6844^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 76520996 and 76521014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76521041) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 478177 + ... + 478336.

Almost surely, 2^76521040 is an apocalyptic number.

It is an amenable number.

76521040 is an abundant number, since it is smaller than the sum of its proper divisors (101390564).

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

76521040 is a wasteful number, since it uses less digits than its factorization.

76521040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 956526 (or 956520 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 76521040 is about 8747.6305363224. The cubic root of 76521040 is about 424.5481518425.

The spelling of 76521040 in words is "seventy-six million, five hundred twenty-one thousand, forty".