1538788938 has 8 divisors (see below), whose sum is σ = 3077577888. Its totient is φ = 512929644.

The previous prime is 1538788931. The next prime is 1538788963. The reversal of 1538788938 is 8398878351.

It is a sphenic number, since it is the product of 3 distinct primes.

1538788938 is an admirable number.

It is a super-2 number, since 2×1538788938² = 4735742791422335688, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1538788931) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 128232406 + ... + 128232417.

It is an arithmetic number, because the mean of its divisors is an integer number (384697236).

Almost surely, 2^1538788938 is an apocalyptic number.

1538788938 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1538788938 is a wasteful number, since it uses less digits than its factorization.

1538788938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256464828.

The product of its digits is 11612160, while the sum is 60.

The square root of 1538788938 is about 39227.4003472063. The cubic root of 1538788938 is about 1154.4975577404.

The spelling of 1538788938 in words is "one billion, five hundred thirty-eight million, seven hundred eighty-eight thousand, nine hundred thirty-eight".