1538150140 has 96 divisors (see below), whose sum is σ = 3557675520. Its totient is φ = 556007424.

The previous prime is 1538150113. The next prime is 1538150161. The reversal of 1538150140 is 410518351.

It is a junction number, because it is equal to n+sod(n) for n = 1538150099 and 1538150108.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2533717 + ... + 2534323.

It is an arithmetic number, because the mean of its divisors is an integer number (37059120).

Almost surely, 2^1538150140 is an apocalyptic number.

1538150140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1538150140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1778837760).

1538150140 is an abundant number, since it is smaller than the sum of its proper divisors (2019525380).

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

1538150140 is a wasteful number, since it uses less digits than its factorization.

1538150140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 919 (or 917 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 28.

The square root of 1538150140 is about 39219.2572596677. The cubic root of 1538150140 is about 1154.3377799680.

Adding to 1538150140 its reverse (410518351), we get a palindrome (1948668491).

The spelling of 1538150140 in words is "one billion, five hundred thirty-eight million, one hundred fifty thousand, one hundred forty".