780964740 has 120 divisors (see below), whose sum is σ = 2461619160. Its totient is φ = 207263232.

The previous prime is 780964729. The next prime is 780964763. The reversal of 780964740 is 47469087.

It can be written as a sum of positive squares in 4 ways, for example, as 544644 + 780420096 = 738^2 + 27936^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 376426 + ... + 378494.

It is an arithmetic number, because the mean of its divisors is an integer number (20513493).

Almost surely, 2^780964740 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 780964740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1230809580).

780964740 is an abundant number, since it is smaller than the sum of its proper divisors (1680654420).

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

780964740 is a wasteful number, since it uses less digits than its factorization.

780964740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2323 (or 2312 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 45.

The square root of 780964740 is about 27945.7463668445. The cubic root of 780964740 is about 920.8957642859.

The spelling of 780964740 in words is "seven hundred eighty million, nine hundred sixty-four thousand, seven hundred forty".