77700148 has 12 divisors (see below), whose sum is σ = 139650532. Its totient is φ = 37800000.

The previous prime is 77700143. The next prime is 77700151. The reversal of 77700148 is 84100777.

It can be written as a sum of positive squares in 2 ways, for example, as 53611684 + 24088464 = 7322^2 + 4908^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77700143) 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 3 ways as a sum of consecutive naturals, for example, 262353 + ... + 262648.

Almost surely, 2^77700148 is an apocalyptic number.

It is an amenable number.

77700148 is a deficient number, since it is larger than the sum of its proper divisors (61950384).

77700148 is a wasteful number, since it uses less digits than its factorization.

77700148 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 525042 (or 525040 counting only the distinct ones).

The product of its (nonzero) digits is 10976, while the sum is 34.

The square root of 77700148 is about 8814.7687434215. The cubic root of 77700148 is about 426.7176585649.

The spelling of 77700148 in words is "seventy-seven million, seven hundred thousand, one hundred forty-eight".