77244742 has 4 divisors (see below), whose sum is σ = 115867116. Its totient is φ = 38622370.

The previous prime is 77244737. The next prime is 77244763. The reversal of 77244742 is 24744277.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19311184 + ... + 19311187.

It is an arithmetic number, because the mean of its divisors is an integer number (28966779).

Almost surely, 2^77244742 is an apocalyptic number.

77244742 is a deficient number, since it is larger than the sum of its proper divisors (38622374).

77244742 is a wasteful number, since it uses less digits than its factorization.

77244742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38622373.

The product of its digits is 87808, while the sum is 37.

The square root of 77244742 is about 8788.8987933643. The cubic root of 77244742 is about 425.8823504895.

The spelling of 77244742 in words is "seventy-seven million, two hundred forty-four thousand, seven hundred forty-two".