77090242 has 8 divisors (see below), whose sum is σ = 119365632. Its totient is φ = 37301700.

The previous prime is 77090219. The next prime is 77090243. The reversal of 77090242 is 24209077.

It is a happy number.

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

It is a Harshad number since it is a multiple of its sum of digits (31).

It is not an unprimeable number, because it can be changed into a prime (77090243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 621634 + ... + 621757.

It is an arithmetic number, because the mean of its divisors is an integer number (14920704).

Almost surely, 2^77090242 is an apocalyptic number.

77090242 is a deficient number, since it is larger than the sum of its proper divisors (42275390).

77090242 is a wasteful number, since it uses less digits than its factorization.

77090242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1243424.

The product of its (nonzero) digits is 7056, while the sum is 31.

The square root of 77090242 is about 8780.1048968677. The cubic root of 77090242 is about 425.5982200787.

The spelling of 77090242 in words is "seventy-seven million, ninety thousand, two hundred forty-two".