77500442 has 8 divisors (see below), whose sum is σ = 116311476. Its totient is φ = 38729952.

The previous prime is 77500427. The next prime is 77500447. The reversal of 77500442 is 24400577.

It can be written as a sum of positive squares in 2 ways, for example, as 69372241 + 8128201 = 8329^2 + 2851^2 .

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

It is not an unprimeable number, because it can be changed into a prime (77500447) 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, 4793 + ... + 13340.

Almost surely, 2^77500442 is an apocalyptic number.

77500442 is a deficient number, since it is larger than the sum of its proper divisors (38811034).

77500442 is a wasteful number, since it uses less digits than its factorization.

77500442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20272.

The product of its (nonzero) digits is 7840, while the sum is 29.

The square root of 77500442 is about 8803.4335347068. The cubic root of 77500442 is about 426.3517596878.

The spelling of 77500442 in words is "seventy-seven million, five hundred thousand, four hundred forty-two".