780667748 has 48 divisors (see below), whose sum is σ = 1632739584. Its totient is φ = 319334400.

The previous prime is 780667747. The next prime is 780667753. The reversal of 780667748 is 847766087.

It is a self number, because there is not a number n which added to its sum of digits gives 780667748.

It is not an unprimeable number, because it can be changed into a prime (780667747) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 386036 + ... + 388052.

It is an arithmetic number, because the mean of its divisors is an integer number (34015408).

Almost surely, 2^780667748 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 780667748, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (816369792).

780667748 is an abundant number, since it is smaller than the sum of its proper divisors (852071836).

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

780667748 is a wasteful number, since it uses less digits than its factorization.

780667748 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2652 (or 2650 counting only the distinct ones).

The product of its (nonzero) digits is 3161088, while the sum is 53.

The square root of 780667748 is about 27940.4321369588. The cubic root of 780667748 is about 920.7790140932.

The spelling of 780667748 in words is "seven hundred eighty million, six hundred sixty-seven thousand, seven hundred forty-eight".