77628423 has 4 divisors (see below), whose sum is σ = 103504568. Its totient is φ = 51752280.

The previous prime is 77628413. The next prime is 77628449. The reversal of 77628423 is 32482677.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32482677 = 3 ⋅10827559.

It is not a de Polignac number, because 77628423 - 2⁴ = 77628407 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77628403) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12938068 + ... + 12938073.

It is an arithmetic number, because the mean of its divisors is an integer number (25876142).

Almost surely, 2^77628423 is an apocalyptic number.

77628423 is a deficient number, since it is larger than the sum of its proper divisors (25876145).

77628423 is a wasteful number, since it uses less digits than its factorization.

77628423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25876144.

The product of its digits is 112896, while the sum is 39.

The square root of 77628423 is about 8810.6993479519. The cubic root of 77628423 is about 426.5863171314.

The spelling of 77628423 in words is "seventy-seven million, six hundred twenty-eight thousand, four hundred twenty-three".