77428922 has 4 divisors (see below), whose sum is σ = 116143386. Its totient is φ = 38714460.

The previous prime is 77428909. The next prime is 77428937. The reversal of 77428922 is 22982477.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 22982477 = 7 ⋅3283211.

It can be written as a sum of positive squares in only one way, i.e., 70241161 + 7187761 = 8381^2 + 2681^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 77428922.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19357229 + ... + 19357232.

Almost surely, 2^77428922 is an apocalyptic number.

77428922 is a deficient number, since it is larger than the sum of its proper divisors (38714464).

77428922 is a wasteful number, since it uses less digits than its factorization.

77428922 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38714463.

The product of its digits is 112896, while the sum is 41.

The square root of 77428922 is about 8799.3705456697. The cubic root of 77428922 is about 426.2205687691.

The spelling of 77428922 in words is "seventy-seven million, four hundred twenty-eight thousand, nine hundred twenty-two".