77789242 has 8 divisors (see below), whose sum is σ = 117172800. Its totient is φ = 38731644.

The previous prime is 77789237. The next prime is 77789333. The reversal of 77789242 is 24298777.

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 = 77789192 and 77789201.

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, 80892 + ... + 81847.

It is an arithmetic number, because the mean of its divisors is an integer number (14646600).

Almost surely, 2^77789242 is an apocalyptic number.

77789242 is a deficient number, since it is larger than the sum of its proper divisors (39383558).

77789242 is a wasteful number, since it uses less digits than its factorization.

77789242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162980.

The product of its digits is 395136, while the sum is 46.

The square root of 77789242 is about 8819.8209732398. The cubic root of 77789242 is about 426.8806932666.

It can be divided in two parts, 7778 and 9242, that added together give a triangular number (17020 = T₁₈₄).

The spelling of 77789242 in words is "seventy-seven million, seven hundred eighty-nine thousand, two hundred forty-two".