1538988393 has 16 divisors (see below), whose sum is σ = 2189284416. Its totient is φ = 958264320.

The previous prime is 1538988389. The next prime is 1538988431. The reversal of 1538988393 is 3938898351.

It is not a de Polignac number, because 1538988393 - 2² = 1538988389 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1538988193) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 108496 + ... + 121857.

It is an arithmetic number, because the mean of its divisors is an integer number (136830276).

Almost surely, 2^1538988393 is an apocalyptic number.

It is an amenable number.

1538988393 is a deficient number, since it is larger than the sum of its proper divisors (650296023).

1538988393 is a wasteful number, since it uses less digits than its factorization.

1538988393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230504.

The product of its digits is 5598720, while the sum is 57.

The square root of 1538988393 is about 39229.9425566747. The cubic root of 1538988393 is about 1154.5474368707.

The spelling of 1538988393 in words is "one billion, five hundred thirty-eight million, nine hundred eighty-eight thousand, three hundred ninety-three".