77212628 has 6 divisors (see below), whose sum is σ = 135122106. Its totient is φ = 38606312.

The previous prime is 77212613. The next prime is 77212631. The reversal of 77212628 is 82621277.

It can be written as a sum of positive squares in only one way, i.e., 72114064 + 5098564 = 8492^2 + 2258^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9651575 + ... + 9651582.

It is an arithmetic number, because the mean of its divisors is an integer number (22520351).

Almost surely, 2^77212628 is an apocalyptic number.

It is an amenable number.

77212628 is a deficient number, since it is larger than the sum of its proper divisors (57909478).

77212628 is a wasteful number, since it uses less digits than its factorization.

77212628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19303161 (or 19303159 counting only the distinct ones).

The product of its digits is 18816, while the sum is 35.

The square root of 77212628 is about 8787.0716396306. The cubic root of 77212628 is about 425.8233230346.

The spelling of 77212628 in words is "seventy-seven million, two hundred twelve thousand, six hundred twenty-eight".