1346728138 has 32 divisors (see below), whose sum is σ = 2327515776. Its totient is φ = 572479488.

The previous prime is 1346728111. The next prime is 1346728157. The reversal of 1346728138 is 8318276431.

It is a junction number, because it is equal to n+sod(n) for n = 1346728094 and 1346728103.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1412670 + ... + 1413622.

It is an arithmetic number, because the mean of its divisors is an integer number (72734868).

Almost surely, 2^1346728138 is an apocalyptic number.

1346728138 is a deficient number, since it is larger than the sum of its proper divisors (980787638).

1346728138 is a wasteful number, since it uses less digits than its factorization.

1346728138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1678.

The product of its digits is 193536, while the sum is 43.

The square root of 1346728138 is about 36697.7947293839. The cubic root of 1346728138 is about 1104.3158648853.

The spelling of 1346728138 in words is "one billion, three hundred forty-six million, seven hundred twenty-eight thousand, one hundred thirty-eight".