1538860120 has 32 divisors (see below), whose sum is σ = 3957069600. Its totient is φ = 527609088.

The previous prime is 1538860109. The next prime is 1538860121. The reversal of 1538860120 is 210688351.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1538860121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2747685 + ... + 2748244.

It is an arithmetic number, because the mean of its divisors is an integer number (123658425).

Almost surely, 2^1538860120 is an apocalyptic number.

1538860120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1538860120 is an abundant number, since it is smaller than the sum of its proper divisors (2418209480).

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

1538860120 is a wasteful number, since it uses less digits than its factorization.

1538860120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5495947 (or 5495943 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 34.

The square root of 1538860120 is about 39228.3076361956. The cubic root of 1538860120 is about 1154.5153592239.

The spelling of 1538860120 in words is "one billion, five hundred thirty-eight million, eight hundred sixty thousand, one hundred twenty".