780288552 has 96 divisors (see below), whose sum is σ = 2203656000. Its totient is φ = 258660864.

The previous prime is 780288541. The next prime is 780288563. The reversal of 780288552 is 255882087.

780288552 is a `hidden beast` number, since 78 + 0 + 28 + 8 + 552 = 666.

It is an interprime number because it is at equal distance from previous prime (780288541) and next prime (780288563).

It is a junction number, because it is equal to n+sod(n) for n = 780288498 and 780288507.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 385848 + ... + 387864.

It is an arithmetic number, because the mean of its divisors is an integer number (22954750).

Almost surely, 2^780288552 is an apocalyptic number.

780288552 is a gapful number since it is divisible by the number (72) 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 780288552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1101828000).

780288552 is an abundant number, since it is smaller than the sum of its proper divisors (1423367448).

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

780288552 is a wasteful number, since it uses less digits than its factorization.

780288552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2237 (or 2221 counting only the distinct ones).

The product of its (nonzero) digits is 358400, while the sum is 45.

The square root of 780288552 is about 27933.6455193374. The cubic root of 780288552 is about 920.6299057317.

The spelling of 780288552 in words is "seven hundred eighty million, two hundred eighty-eight thousand, five hundred fifty-two".