780607780 has 24 divisors (see below), whose sum is σ = 1725554880. Its totient is φ = 295809120.

The previous prime is 780607777. The next prime is 780607783. The reversal of 780607780 is 87706087.

It is an interprime number because it is at equal distance from previous prime (780607777) and next prime (780607783).

It is not an unprimeable number, because it can be changed into a prime (780607783) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1026736 + ... + 1027495.

It is an arithmetic number, because the mean of its divisors is an integer number (71898120).

Almost surely, 2^780607780 is an apocalyptic number.

It is an amenable number.

780607780 is an abundant number, since it is smaller than the sum of its proper divisors (944947100).

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

780607780 is a wasteful number, since it uses less digits than its factorization.

780607780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2054259 (or 2054257 counting only the distinct ones).

The product of its (nonzero) digits is 131712, while the sum is 43.

The square root of 780607780 is about 27939.3589761827. The cubic root of 780607780 is about 920.7554365469.

The spelling of 780607780 in words is "seven hundred eighty million, six hundred seven thousand, seven hundred eighty".