780068520 has 384 divisors, whose sum is σ = 3202467840. Its totient is φ = 159966720.

The previous prime is 780068507. The next prime is 780068533. The reversal of 780068520 is 25860087.

780068520 is a `hidden beast` number, since 78 + 0 + 0 + 68 + 520 = 666.

It is an interprime number because it is at equal distance from previous prime (780068507) and next prime (780068533).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2965909 + ... + 2966171.

It is an arithmetic number, because the mean of its divisors is an integer number (8339760).

Almost surely, 2^780068520 is an apocalyptic number.

780068520 is a gapful number since it is divisible by the number (70) 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 780068520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1601233920).

780068520 is an abundant number, since it is smaller than the sum of its proper divisors (2422399320).

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

780068520 is a wasteful number, since it uses less digits than its factorization.

780068520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 405 (or 398 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 36.

The square root of 780068520 is about 27929.7067653780. The cubic root of 780068520 is about 920.5433620710.

The spelling of 780068520 in words is "seven hundred eighty million, sixty-eight thousand, five hundred twenty".