77528040 has 32 divisors (see below), whose sum is σ = 232584480. Its totient is φ = 20674112.

The previous prime is 77528023. The next prime is 77528053. The reversal of 77528040 is 4082577.

It is a junction number, because it is equal to n+sod(n) for n = 77527992 and 77528010.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 322914 + ... + 323153.

It is an arithmetic number, because the mean of its divisors is an integer number (7268265).

Almost surely, 2^77528040 is an apocalyptic number.

It is an amenable number.

77528040 is an abundant number, since it is smaller than the sum of its proper divisors (155056440).

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

77528040 is a wasteful number, since it uses less digits than its factorization.

77528040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 646081 (or 646077 counting only the distinct ones).

The product of its (nonzero) digits is 15680, while the sum is 33.

The square root of 77528040 is about 8805.0008517887. Note that the first 3 decimals coincide. The cubic root of 77528040 is about 426.4023618055.

The spelling of 77528040 in words is "seventy-seven million, five hundred twenty-eight thousand, forty".