1346744778 has 16 divisors (see below), whose sum is σ = 2756129376. Its totient is φ = 438474960.

The previous prime is 1346744771. The next prime is 1346744779. The reversal of 1346744778 is 8774476431.

It is a self number, because there is not a number n which added to its sum of digits gives 1346744778.

It is not an unprimeable number, because it can be changed into a prime (1346744771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2609713 + ... + 2610228.

It is an arithmetic number, because the mean of its divisors is an integer number (172258086).

Almost surely, 2^1346744778 is an apocalyptic number.

1346744778 is an abundant number, since it is smaller than the sum of its proper divisors (1409384598).

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

1346744778 is a wasteful number, since it uses less digits than its factorization.

1346744778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5219989.

The product of its digits is 3161088, while the sum is 51.

The square root of 1346744778 is about 36698.0214453041. The cubic root of 1346744778 is about 1104.3204131283.

The spelling of 1346744778 in words is "one billion, three hundred forty-six million, seven hundred forty-four thousand, seven hundred seventy-eight".