780828456 has 16 divisors (see below), whose sum is σ = 1952071200. Its totient is φ = 260276144.

The previous prime is 780828409. The next prime is 780828457. The reversal of 780828456 is 654828087.

It is not an unprimeable number, because it can be changed into a prime (780828457) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16267236 + ... + 16267283.

It is an arithmetic number, because the mean of its divisors is an integer number (122004450).

Almost surely, 2^780828456 is an apocalyptic number.

It is an amenable number.

780828456 is an abundant number, since it is smaller than the sum of its proper divisors (1171242744).

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

780828456 is a wasteful number, since it uses less digits than its factorization.

780828456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32534528 (or 32534524 counting only the distinct ones).

The product of its (nonzero) digits is 860160, while the sum is 48.

The square root of 780828456 is about 27943.3078929464. The cubic root of 780828456 is about 920.8421935107.

The spelling of 780828456 in words is "seven hundred eighty million, eight hundred twenty-eight thousand, four hundred fifty-six".