77329988 has 12 divisors (see below), whose sum is σ = 135448572. Its totient is φ = 38630400.

The previous prime is 77329951. The next prime is 77330003. The reversal of 77329988 is 88992377.

It can be written as a sum of positive squares in 2 ways, for example, as 14730244 + 62599744 = 3838^2 + 7912^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3245 + ... + 12852.

It is an arithmetic number, because the mean of its divisors is an integer number (11287381).

Almost surely, 2^77329988 is an apocalyptic number.

It is an amenable number.

77329988 is a deficient number, since it is larger than the sum of its proper divisors (58118584).

77329988 is a wasteful number, since it uses less digits than its factorization.

77329988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17302 (or 17300 counting only the distinct ones).

The product of its digits is 1524096, while the sum is 53.

The square root of 77329988 is about 8793.7470966591. The cubic root of 77329988 is about 426.0389584302.

The spelling of 77329988 in words is "seventy-seven million, three hundred twenty-nine thousand, nine hundred eighty-eight".