1538377860 has 48 divisors (see below), whose sum is σ = 4423882176. Its totient is φ = 399146112.

The previous prime is 1538377843. The next prime is 1538377861. The reversal of 1538377860 is 687738351.

It is not an unprimeable number, because it can be changed into a prime (1538377861) 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, 344262 + ... + 348701.

It is an arithmetic number, because the mean of its divisors is an integer number (92164212).

Almost surely, 2^1538377860 is an apocalyptic number.

1538377860 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1538377860 is an abundant number, since it is smaller than the sum of its proper divisors (2885504316).

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

1538377860 is a wasteful number, since it uses less digits than its factorization.

1538377860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 693012 (or 693010 counting only the distinct ones).

The product of its (nonzero) digits is 846720, while the sum is 48.

The square root of 1538377860 is about 39222.1603178611. The cubic root of 1538377860 is about 1154.3947429439.

The spelling of 1538377860 in words is "one billion, five hundred thirty-eight million, three hundred seventy-seven thousand, eight hundred sixty".