780530136 has 32 divisors (see below), whose sum is σ = 1983318000. Its totient is φ = 255911040.

The previous prime is 780530123. The next prime is 780530137. The reversal of 780530136 is 631035087.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 780530097 and 780530106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (780530137) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 265111 + ... + 268038.

Almost surely, 2^780530136 is an apocalyptic number.

It is an amenable number.

780530136 is an abundant number, since it is smaller than the sum of its proper divisors (1202787864).

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

780530136 is a wasteful number, since it uses less digits than its factorization.

780530136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 533219 (or 533215 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 33.

The square root of 780530136 is about 27937.9694322977. The cubic root of 780530136 is about 920.7249075551.

The spelling of 780530136 in words is "seven hundred eighty million, five hundred thirty thousand, one hundred thirty-six".