788505385 has 4 divisors (see below), whose sum is σ = 946206468. Its totient is φ = 630804304.

The previous prime is 788505383. The next prime is 788505391. The reversal of 788505385 is 583505887.

788505385 = T₂₂₉₂₆ + T₂₂₉₂₇ + T₂₂₉₂₈.

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 109746576 + 678758809 = 10476^2 + 26053^2 .

It is a cyclic number.

It is not a de Polignac number, because 788505385 - 2¹ = 788505383 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (788505383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 78850534 + ... + 78850543.

It is an arithmetic number, because the mean of its divisors is an integer number (236551617).

Almost surely, 2^788505385 is an apocalyptic number.

788505385 is the 22928-th centered triangular number.

It is an amenable number.

788505385 is a deficient number, since it is larger than the sum of its proper divisors (157701083).

788505385 is a wasteful number, since it uses less digits than its factorization.

788505385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157701082.

The product of its (nonzero) digits is 1344000, while the sum is 49.

The square root of 788505385 is about 28080.3380499594. The cubic root of 788505385 is about 923.8501944284.

The spelling of 788505385 in words is "seven hundred eighty-eight million, five hundred five thousand, three hundred eighty-five".