1389226816 has 28 divisors (see below), whose sum is σ = 2759220288. Its totient is φ = 693990272.

The previous prime is 1389226807. The next prime is 1389226829. The reversal of 1389226816 is 6186229831.

It is a super-2 number, since 2×1389226816² = 3859902292586995712, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66825 + ... + 85111.

Almost surely, 2^1389226816 is an apocalyptic number.

1389226816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1389226816 is a deficient number, since it is larger than the sum of its proper divisors (1369993472).

1389226816 is a wasteful number, since it uses less digits than its factorization.

1389226816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19486 (or 19476 counting only the distinct ones).

The product of its digits is 248832, while the sum is 46.

The square root of 1389226816 is about 37272.3331172064. Note that the first 3 decimals coincide. The cubic root of 1389226816 is about 1115.8120639496.

The spelling of 1389226816 in words is "one billion, three hundred eighty-nine million, two hundred twenty-six thousand, eight hundred sixteen".