1538343650 has 12 divisors (see below), whose sum is σ = 2861319282. Its totient is φ = 615337440.

The previous prime is 1538343643. The next prime is 1538343727. The reversal of 1538343650 is 563438351.

It can be written as a sum of positive squares in 3 ways, for example, as 1371443089 + 166900561 = 37033^2 + 12919^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 15383387 + ... + 15383486.

Almost surely, 2^1538343650 is an apocalyptic number.

1538343650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1538343650 is a deficient number, since it is larger than the sum of its proper divisors (1322975632).

1538343650 is a wasteful number, since it uses less digits than its factorization.

1538343650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30766885 (or 30766880 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 38.

The square root of 1538343650 is about 39221.7242099324. The cubic root of 1538343650 is about 1154.3861858488.

The spelling of 1538343650 in words is "one billion, five hundred thirty-eight million, three hundred forty-three thousand, six hundred fifty".