788861281 has 4 divisors (see below), whose sum is σ = 849542932. Its totient is φ = 728179632.

The previous prime is 788861263. The next prime is 788861303. The reversal of 788861281 is 182168887.

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 487526400 + 301334881 = 22080^2 + 17359^2 .

It is a cyclic number.

It is not a de Polignac number, because 788861281 - 2⁹ = 788860769 is a prime.

It is a super-2 number, since 2×788861281² = 1244604241321921922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (788861581) 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, 30340806 + ... + 30340831.

It is an arithmetic number, because the mean of its divisors is an integer number (212385733).

Almost surely, 2^788861281 is an apocalyptic number.

It is an amenable number.

788861281 is a deficient number, since it is larger than the sum of its proper divisors (60681651).

788861281 is a wasteful number, since it uses less digits than its factorization.

788861281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60681650.

The product of its digits is 344064, while the sum is 49.

The square root of 788861281 is about 28086.6744382456. The cubic root of 788861281 is about 923.9891683825.

It can be divided in two parts, 7888 and 61281, that added together give a square (69169 = 263²).

The spelling of 788861281 in words is "seven hundred eighty-eight million, eight hundred sixty-one thousand, two hundred eighty-one".