780085648 has 10 divisors (see below), whose sum is σ = 1511415974. Its totient is φ = 390042816.

The previous prime is 780085637. The next prime is 780085667. The reversal of 780085648 is 846580087.

It can be written as a sum of positive squares in only one way, i.e., 696326544 + 83759104 = 26388^2 + 9152^2 .

It is a junction number, because it is equal to n+sod(n) for n = 780085598 and 780085607.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24377661 + ... + 24377692.

Almost surely, 2^780085648 is an apocalyptic number.

It is an amenable number.

780085648 is a deficient number, since it is larger than the sum of its proper divisors (731330326).

780085648 is a wasteful number, since it uses less digits than its factorization.

780085648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48755361 (or 48755355 counting only the distinct ones).

The product of its (nonzero) digits is 430080, while the sum is 46.

The square root of 780085648 is about 27930.0133906162. The cubic root of 780085648 is about 920.5500994925.

The spelling of 780085648 in words is "seven hundred eighty million, eighty-five thousand, six hundred forty-eight".