1378942730 has 16 divisors (see below), whose sum is σ = 2707742304. Its totient is φ = 501433680.

The previous prime is 1378942723. The next prime is 1378942753. The reversal of 1378942730 is 372498731.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6267812 + ... + 6268031.

It is an arithmetic number, because the mean of its divisors is an integer number (169233894).

Almost surely, 2^1378942730 is an apocalyptic number.

1378942730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1378942730 is a deficient number, since it is larger than the sum of its proper divisors (1328799574).

1378942730 is a wasteful number, since it uses less digits than its factorization.

1378942730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12535861.

The product of its (nonzero) digits is 254016, while the sum is 44.

The square root of 1378942730 is about 37134.1181395223. The cubic root of 1378942730 is about 1113.0518859208.

The spelling of 1378942730 in words is "one billion, three hundred seventy-eight million, nine hundred forty-two thousand, seven hundred thirty".