77049418 has 4 divisors (see below), whose sum is σ = 115574130. Its totient is φ = 38524708.

The previous prime is 77049409. The next prime is 77049419. The reversal of 77049418 is 81494077.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 77035729 + 13689 = 8777^2 + 117^2 .

It is a super-2 number, since 2×77049418² = 11873225628277448, 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 not an unprimeable number, because it can be changed into a prime (77049419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19262353 + ... + 19262356.

Almost surely, 2^77049418 is an apocalyptic number.

77049418 is a deficient number, since it is larger than the sum of its proper divisors (38524712).

77049418 is a wasteful number, since it uses less digits than its factorization.

77049418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38524711.

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

The square root of 77049418 is about 8777.7797876228. The cubic root of 77049418 is about 425.5230800473.

The spelling of 77049418 in words is "seventy-seven million, forty-nine thousand, four hundred eighteen".