77438222 has 8 divisors (see below), whose sum is σ = 117185616. Its totient is φ = 38376352.

The previous prime is 77438197. The next prime is 77438233. The reversal of 77438222 is 22283477.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 171098 + ... + 171549.

It is an arithmetic number, because the mean of its divisors is an integer number (14648202).

Almost surely, 2^77438222 is an apocalyptic number.

77438222 is a deficient number, since it is larger than the sum of its proper divisors (39747394).

77438222 is a wasteful number, since it uses less digits than its factorization.

77438222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342762.

The product of its digits is 37632, while the sum is 35.

The square root of 77438222 is about 8799.8989766929. The cubic root of 77438222 is about 426.2376325591.

The spelling of 77438222 in words is "seventy-seven million, four hundred thirty-eight thousand, two hundred twenty-two".