77489938 has 8 divisors (see below), whose sum is σ = 117827388. Its totient is φ = 38214144.

The previous prime is 77489917. The next prime is 77489941. The reversal of 77489938 is 83998477.

It can be written as a sum of positive squares in 2 ways, for example, as 76160529 + 1329409 = 8727^2 + 1153^2 .

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

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, 265231 + ... + 265522.

Almost surely, 2^77489938 is an apocalyptic number.

77489938 is a deficient number, since it is larger than the sum of its proper divisors (40337450).

77489938 is a wasteful number, since it uses less digits than its factorization.

77489938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 530828.

The product of its digits is 3048192, while the sum is 55.

The square root of 77489938 is about 8802.8369290814. The cubic root of 77489938 is about 426.3324969967.

The spelling of 77489938 in words is "seventy-seven million, four hundred eighty-nine thousand, nine hundred thirty-eight".