77328242 has 4 divisors (see below), whose sum is σ = 115992366. Its totient is φ = 38664120.

The previous prime is 77328227. The next prime is 77328247. The reversal of 77328242 is 24282377.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24282377 = 7 ⋅3468911.

It can be written as a sum of positive squares in only one way, i.e., 64144081 + 13184161 = 8009^2 + 3631^2 .

It is not an unprimeable number, because it can be changed into a prime (77328247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19332059 + ... + 19332062.

Almost surely, 2^77328242 is an apocalyptic number.

77328242 is a deficient number, since it is larger than the sum of its proper divisors (38664124).

77328242 is a wasteful number, since it uses less digits than its factorization.

77328242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38664123.

The product of its digits is 37632, while the sum is 35.

The square root of 77328242 is about 8793.6478210126. The cubic root of 77328242 is about 426.0357519569.

The spelling of 77328242 in words is "seventy-seven million, three hundred twenty-eight thousand, two hundred forty-two".