1538397930 has 32 divisors (see below), whose sum is σ = 3733646400. Its totient is φ = 405629312.

The previous prime is 1538397911. The next prime is 1538397989. The reversal of 1538397930 is 397938351.

It is a self number, because there is not a number n which added to its sum of digits gives 1538397930.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 285420 + ... + 290759.

It is an arithmetic number, because the mean of its divisors is an integer number (116676450).

Almost surely, 2^1538397930 is an apocalyptic number.

1538397930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1538397930 is an abundant number, since it is smaller than the sum of its proper divisors (2195248470).

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

1538397930 is a wasteful number, since it uses less digits than its factorization.

1538397930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 576278.

The product of its (nonzero) digits is 612360, while the sum is 48.

The square root of 1538397930 is about 39222.4161672888. The cubic root of 1538397930 is about 1154.3997630806.

The spelling of 1538397930 in words is "one billion, five hundred thirty-eight million, three hundred ninety-seven thousand, nine hundred thirty".