77311242 has 24 divisors (see below), whose sum is σ = 168217920. Its totient is φ = 25661160.

The previous prime is 77311237. The next prime is 77311279. The reversal of 77311242 is 24211377.

It is a happy 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 in 11 ways as a sum of consecutive naturals, for example, 4684 + ... + 13287.

It is an arithmetic number, because the mean of its divisors is an integer number (7009080).

Almost surely, 2^77311242 is an apocalyptic number.

77311242 is an abundant number, since it is smaller than the sum of its proper divisors (90906678).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

77311242 is a wasteful number, since it uses less digits than its factorization.

77311242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18218 (or 18215 counting only the distinct ones).

The product of its digits is 2352, while the sum is 27.

The square root of 77311242 is about 8792.6811610566. The cubic root of 77311242 is about 426.0045294764.

The spelling of 77311242 in words is "seventy-seven million, three hundred eleven thousand, two hundred forty-two".