77885530 has 16 divisors (see below), whose sum is σ = 140372640. Its totient is φ = 31114512.

The previous prime is 77885497. The next prime is 77885531. The reversal of 77885530 is 3558877.

It is not an unprimeable number, because it can be changed into a prime (77885531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4057 + ... + 13123.

It is an arithmetic number, because the mean of its divisors is an integer number (8773290).

Almost surely, 2^77885530 is an apocalyptic number.

77885530 is a deficient number, since it is larger than the sum of its proper divisors (62487110).

77885530 is a wasteful number, since it uses less digits than its factorization.

77885530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9933.

The product of its (nonzero) digits is 235200, while the sum is 43.

The square root of 77885530 is about 8825.2778993072. The cubic root of 77885530 is about 427.0567524894.

The spelling of 77885530 in words is "seventy-seven million, eight hundred eighty-five thousand, five hundred thirty".