780683442 has 128 divisors (see below), whose sum is σ = 2009456640. Its totient is φ = 196335360.

The previous prime is 780683441. The next prime is 780683467. The reversal of 780683442 is 244386087.

It is a super-2 number, since 2×780683442² = 1218933273225934728, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 780683394 and 780683403.

It is not an unprimeable number, because it can be changed into a prime (780683441) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3408984 + ... + 3409212.

It is an arithmetic number, because the mean of its divisors is an integer number (15698880).

Almost surely, 2^780683442 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 780683442, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1004728320).

780683442 is an abundant number, since it is smaller than the sum of its proper divisors (1228773198).

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

780683442 is a wasteful number, since it uses less digits than its factorization.

780683442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 456.

The product of its (nonzero) digits is 258048, while the sum is 42.

The square root of 780683442 is about 27940.7129830289. The cubic root of 780683442 is about 920.7851842849.

The spelling of 780683442 in words is "seven hundred eighty million, six hundred eighty-three thousand, four hundred forty-two".