780374916 has 72 divisors (see below), whose sum is σ = 2105812800. Its totient is φ = 242948160.

The previous prime is 780374911. The next prime is 780374921. The reversal of 780374916 is 619473087.

It is an interprime number because it is at equal distance from previous prime (780374911) and next prime (780374921).

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (780374911) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 40530 + ... + 56598.

It is an arithmetic number, because the mean of its divisors is an integer number (29247400).

Almost surely, 2^780374916 is an apocalyptic number.

780374916 is a gapful number since it is divisible by the number (76) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 780374916, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1052906400).

780374916 is an abundant number, since it is smaller than the sum of its proper divisors (1325437884).

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

780374916 is a wasteful number, since it uses less digits than its factorization.

780374916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16169 (or 16164 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 45.

The square root of 780374916 is about 27935.1913542757. The cubic root of 780374916 is about 920.6638702387.

The spelling of 780374916 in words is "seven hundred eighty million, three hundred seventy-four thousand, nine hundred sixteen".