77398 has 4 divisors (see below), whose sum is σ = 116100. Its totient is φ = 38698.

The previous prime is 77383. The next prime is 77417. The reversal of 77398 is 89377.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 89377 = 139 ⋅643.

It is a congruent number.

It is an unprimeable number.

77398 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19348 + ... + 19351.

It is an arithmetic number, because the mean of its divisors is an integer number (29025).

2⁷⁷³⁹⁸ is an apocalyptic number.

77398 is a deficient number, since it is larger than the sum of its proper divisors (38702).

77398 is a wasteful number, since it uses less digits than its factorization.

77398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38701.

The product of its digits is 10584, while the sum is 34.

The square root of 77398 is about 278.2049604159. The cubic root of 77398 is about 42.6163822759.

The spelling of 77398 in words is "seventy-seven thousand, three hundred ninety-eight".