77742338 has 8 divisors (see below), whose sum is σ = 122751120. Its totient is φ = 36825300.

The previous prime is 77742331. The next prime is 77742347. The reversal of 77742338 is 83324777.

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

It is a super-2 number, since 2×77742338² = 12087742235412488, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 77742295 and 77742304.

It is not an unprimeable number, because it can be changed into a prime (77742331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1022888 + ... + 1022963.

It is an arithmetic number, because the mean of its divisors is an integer number (15343890).

Almost surely, 2^77742338 is an apocalyptic number.

77742338 is a deficient number, since it is larger than the sum of its proper divisors (45008782).

77742338 is a wasteful number, since it uses less digits than its factorization.

77742338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2045872.

The product of its digits is 197568, while the sum is 41.

The square root of 77742338 is about 8817.1615614097. The cubic root of 77742338 is about 426.7948783256.

The spelling of 77742338 in words is "seventy-seven million, seven hundred forty-two thousand, three hundred thirty-eight".