780487680 has 528 divisors, whose sum is σ = 3125130336. Its totient is φ = 165150720.

The previous prime is 780487667. The next prime is 780487691. The reversal of 780487680 is 86784087.

It is a super-2 number, since 2×780487680² = 1218322037263564800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 12794850 + ... + 12794910.

Almost surely, 2^780487680 is an apocalyptic number.

780487680 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 780487680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1562565168).

780487680 is an abundant number, since it is smaller than the sum of its proper divisors (2344642656).

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

780487680 is a wasteful number, since it uses less digits than its factorization.

780487680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120 (or 95 counting only the distinct ones).

The product of its (nonzero) digits is 602112, while the sum is 48.

The square root of 780487680 is about 27937.2095958061. The cubic root of 780487680 is about 920.7082133437.

The spelling of 780487680 in words is "seven hundred eighty million, four hundred eighty-seven thousand, six hundred eighty".