77942182 has 4 divisors (see below), whose sum is σ = 116913276. Its totient is φ = 38971090.

The previous prime is 77942159. The next prime is 77942191. The reversal of 77942182 is 28124977.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 28124977 = 2243 ⋅12539.

It is a super-2 number, since 2×77942182² = 12149967469842248, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

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 as a sum of consecutive naturals, namely, 19485544 + ... + 19485547.

It is an arithmetic number, because the mean of its divisors is an integer number (29228319).

Almost surely, 2^77942182 is an apocalyptic number.

77942182 is a deficient number, since it is larger than the sum of its proper divisors (38971094).

77942182 is a wasteful number, since it uses less digits than its factorization.

77942182 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38971093.

The product of its digits is 56448, while the sum is 40.

The square root of 77942182 is about 8828.4869598363. The cubic root of 77942182 is about 427.1602708860.

The spelling of 77942182 in words is "seventy-seven million, nine hundred forty-two thousand, one hundred eighty-two".