77311398 has 8 divisors (see below), whose sum is σ = 154622808. Its totient is φ = 25770464.

The previous prime is 77311397. The next prime is 77311457. The reversal of 77311398 is 89311377.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

77311398 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77311397) 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, 6442611 + ... + 6442622.

It is an arithmetic number, because the mean of its divisors is an integer number (19327851).

Almost surely, 2^77311398 is an apocalyptic number.

77311398 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

77311398 is a wasteful number, since it uses less digits than its factorization.

77311398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12885238.

The product of its digits is 31752, while the sum is 39.

The square root of 77311398 is about 8792.6900320664. The cubic root of 77311398 is about 426.0048160094.

The spelling of 77311398 in words is "seventy-seven million, three hundred eleven thousand, three hundred ninety-eight".