1538233938 has 24 divisors (see below), whose sum is σ = 3343708368. Its totient is φ = 511072632.

The previous prime is 1538233927. The next prime is 1538233943. The reversal of 1538233938 is 8393328351.

1538233938 is a `hidden beast` number, since 1 + 538 + 23 + 3 + 93 + 8 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 1538233893 and 1538233902.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 133656 + ... + 144707.

It is an arithmetic number, because the mean of its divisors is an integer number (139321182).

Almost surely, 2^1538233938 is an apocalyptic number.

1538233938 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1538233938 is an abundant number, since it is smaller than the sum of its proper divisors (1805474430).

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

1538233938 is a wasteful number, since it uses less digits than its factorization.

1538233938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278678 (or 278675 counting only the distinct ones).

The product of its digits is 466560, while the sum is 45.

The square root of 1538233938 is about 39220.3255723356. The cubic root of 1538233938 is about 1154.3587422564.

The spelling of 1538233938 in words is "one billion, five hundred thirty-eight million, two hundred thirty-three thousand, nine hundred thirty-eight".