77770052 has 12 divisors (see below), whose sum is σ = 136605420. Its totient is φ = 38739936.

The previous prime is 77770051. The next prime is 77770057. The reversal of 77770052 is 25007777.

It can be written as a sum of positive squares in 2 ways, for example, as 37650496 + 40119556 = 6136^2 + 6334^2 .

It is a junction number, because it is equal to n+sod(n) for n = 77769994 and 77770021.

It is not an unprimeable number, because it can be changed into a prime (77770051) 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, 35063 + ... + 37214.

It is an arithmetic number, because the mean of its divisors is an integer number (11383785).

Almost surely, 2^77770052 is an apocalyptic number.

It is an amenable number.

77770052 is a deficient number, since it is larger than the sum of its proper divisors (58835368).

77770052 is a wasteful number, since it uses less digits than its factorization.

77770052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72550 (or 72548 counting only the distinct ones).

The product of its (nonzero) digits is 24010, while the sum is 35.

The square root of 77770052 is about 8818.7330155754. The cubic root of 77770052 is about 426.8455876659.

The spelling of 77770052 in words is "seventy-seven million, seven hundred seventy thousand, fifty-two".