800777940 has 24 divisors (see below), whose sum is σ = 2242178400. Its totient is φ = 213540768.

The previous prime is 800777917. The next prime is 800777947. The reversal of 800777940 is 49777008.

It is a junction number, because it is equal to n+sod(n) for n = 800777892 and 800777901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (800777947) 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 7 ways as a sum of consecutive naturals, for example, 6673090 + ... + 6673209.

It is an arithmetic number, because the mean of its divisors is an integer number (93424100).

Almost surely, 2^800777940 is an apocalyptic number.

It is an amenable number.

800777940 is an abundant number, since it is smaller than the sum of its proper divisors (1441400460).

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

800777940 is a wasteful number, since it uses less digits than its factorization.

800777940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13346311 (or 13346309 counting only the distinct ones).

The product of its (nonzero) digits is 98784, while the sum is 42.

The square root of 800777940 is about 28298.0200720828. The cubic root of 800777940 is about 928.6185757070.

The spelling of 800777940 in words is "eight hundred million, seven hundred seventy-seven thousand, nine hundred forty".