780123412 has 12 divisors (see below), whose sum is σ = 1365499296. Its totient is φ = 389980760.

The previous prime is 780123371. The next prime is 780123419. The reversal of 780123412 is 214321087.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (780123419) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4923 + ... + 39805.

It is an arithmetic number, because the mean of its divisors is an integer number (113791608).

Almost surely, 2^780123412 is an apocalyptic number.

It is an amenable number.

780123412 is a deficient number, since it is larger than the sum of its proper divisors (585375884).

780123412 is a wasteful number, since it uses less digits than its factorization.

780123412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40478 (or 40476 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 780123412 is about 27930.6894293714. The cubic root of 780123412 is about 920.5649538841.

Adding to 780123412 its reverse (214321087), we get a palindrome (994444499).

It can be divided in two parts, 7801 and 23412, that added together give a palindrome (31213).

The spelling of 780123412 in words is "seven hundred eighty million, one hundred twenty-three thousand, four hundred twelve".