1394442780 has 48 divisors (see below), whose sum is σ = 3906312480. Its totient is φ = 371673088.

The previous prime is 1394442779. The next prime is 1394442823. The reversal of 1394442780 is 872444931.

1394442780 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 162436 + ... + 170804.

It is an arithmetic number, because the mean of its divisors is an integer number (81381510).

Almost surely, 2^1394442780 is an apocalyptic number.

1394442780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1394442780 is an abundant number, since it is smaller than the sum of its proper divisors (2511869700).

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

1394442780 is a wasteful number, since it uses less digits than its factorization.

1394442780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11158 (or 11156 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 42.

The square root of 1394442780 is about 37342.2385510028. The cubic root of 1394442780 is about 1117.2067886301.

The spelling of 1394442780 in words is "one billion, three hundred ninety-four million, four hundred forty-two thousand, seven hundred eighty".