766784394 has 20 divisors (see below), whose sum is σ = 1718165394. Its totient is φ = 255594744.

The previous prime is 766784377. The next prime is 766784399. The reversal of 766784394 is 493487667.

It is a happy number.

766784394 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 707294025 + 59490369 = 26595^2 + 7713^2 .

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 766784394.

It is not an unprimeable number, because it can be changed into a prime (766784399) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 2366457 + ... + 2366780.

Almost surely, 2^766784394 is an apocalyptic number.

766784394 is an abundant number, since it is smaller than the sum of its proper divisors (951381000).

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

766784394 is a wasteful number, since it uses less digits than its factorization.

766784394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4733251 (or 4733242 counting only the distinct ones).

The product of its digits is 6096384, while the sum is 54.

The square root of 766784394 is about 27690.8720339393. The cubic root of 766784394 is about 915.2879717080.

The spelling of 766784394 in words is "seven hundred sixty-six million, seven hundred eighty-four thousand, three hundred ninety-four".