77305422 has 16 divisors (see below), whose sum is σ = 157146192. Its totient is φ = 25345920.

The previous prime is 77305421. The next prime is 77305427. The reversal of 77305422 is 22450377.

It is a super-2 number, since 2×77305422² = 11952256541196168, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 77305422.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77305421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 105243 + ... + 105974.

It is an arithmetic number, because the mean of its divisors is an integer number (9821637).

Almost surely, 2^77305422 is an apocalyptic number.

77305422 is an abundant number, since it is smaller than the sum of its proper divisors (79840770).

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

77305422 is a wasteful number, since it uses less digits than its factorization.

77305422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211283.

The product of its (nonzero) digits is 11760, while the sum is 30.

The square root of 77305422 is about 8792.3501977571. The cubic root of 77305422 is about 425.9938393167.

Adding to 77305422 its reverse (22450377), we get a palindrome (99755799).

The spelling of 77305422 in words is "seventy-seven million, three hundred five thousand, four hundred twenty-two".