77816422 has 16 divisors (see below), whose sum is σ = 118992960. Its totient is φ = 38158848.

The previous prime is 77816371. The next prime is 77816423. The reversal of 77816422 is 22461877.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77816423) 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, 23238 + ... + 26374.

It is an arithmetic number, because the mean of its divisors is an integer number (7437060).

Almost surely, 2^77816422 is an apocalyptic number.

77816422 is a deficient number, since it is larger than the sum of its proper divisors (41176538).

77816422 is a wasteful number, since it uses less digits than its factorization.

77816422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3375.

The product of its digits is 37632, while the sum is 37.

The square root of 77816422 is about 8821.3616862704. The cubic root of 77816422 is about 426.9304056513.

The spelling of 77816422 in words is "seventy-seven million, eight hundred sixteen thousand, four hundred twenty-two".