1378944930 has 64 divisors (see below), whose sum is σ = 3614284800. Its totient is φ = 333923520.

The previous prime is 1378944911. The next prime is 1378944943. The reversal of 1378944930 is 394498731.

It is a happy number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1378944930.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 413811 + ... + 417129.

It is an arithmetic number, because the mean of its divisors is an integer number (56473200).

Almost surely, 2^1378944930 is an apocalyptic number.

1378944930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1378944930 is an abundant number, since it is smaller than the sum of its proper divisors (2235339870).

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

1378944930 is a wasteful number, since it uses less digits than its factorization.

1378944930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4599.

The product of its (nonzero) digits is 653184, while the sum is 48.

The square root of 1378944930 is about 37134.1477618647. The cubic root of 1378944930 is about 1113.0524778509.

The spelling of 1378944930 in words is "one billion, three hundred seventy-eight million, nine hundred forty-four thousand, nine hundred thirty".