77285738 has 8 divisors (see below), whose sum is σ = 118756260. Its totient is φ = 37700320.

The previous prime is 77285729. The next prime is 77285743. The reversal of 77285738 is 83758277.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 65334889 + 11950849 = 8083^2 + 3457^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 77285692 and 77285701.

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 in 3 ways as a sum of consecutive naturals, for example, 471173 + ... + 471336.

Almost surely, 2^77285738 is an apocalyptic number.

77285738 is a deficient number, since it is larger than the sum of its proper divisors (41470522).

77285738 is a wasteful number, since it uses less digits than its factorization.

77285738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 942552.

The product of its digits is 658560, while the sum is 47.

The square root of 77285738 is about 8791.2307443270. The cubic root of 77285738 is about 425.9576798239.

The spelling of 77285738 in words is "seventy-seven million, two hundred eighty-five thousand, seven hundred thirty-eight".