798400765 has 4 divisors (see below), whose sum is σ = 958080924. Its totient is φ = 638720608.

The previous prime is 798400721. The next prime is 798400783. The reversal of 798400765 is 567004897.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 463583961 + 334816804 = 21531^2 + 18298^2 .

It is a cyclic number.

It is not a de Polignac number, because 798400765 - 2¹¹ = 798398717 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 79840072 + ... + 79840081.

It is an arithmetic number, because the mean of its divisors is an integer number (239520231).

Almost surely, 2^798400765 is an apocalyptic number.

It is an amenable number.

798400765 is a deficient number, since it is larger than the sum of its proper divisors (159680159).

798400765 is a wasteful number, since it uses less digits than its factorization.

798400765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159680158.

The product of its (nonzero) digits is 423360, while the sum is 46.

The square root of 798400765 is about 28255.9863568767. The cubic root of 798400765 is about 927.6987714631.

The spelling of 798400765 in words is "seven hundred ninety-eight million, four hundred thousand, seven hundred sixty-five".