1537812138 has 8 divisors (see below), whose sum is σ = 3075624288. Its totient is φ = 512604044.

The previous prime is 1537812137. The next prime is 1537812149. The reversal of 1537812138 is 8312187351.

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

1537812138 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 1537812096 and 1537812105.

It is not an unprimeable number, because it can be changed into a prime (1537812137) 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, 128151006 + ... + 128151017.

It is an arithmetic number, because the mean of its divisors is an integer number (384453036).

Almost surely, 2^1537812138 is an apocalyptic number.

1537812138 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.

1537812138 is a wasteful number, since it uses less digits than its factorization.

1537812138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256302028.

The product of its digits is 40320, while the sum is 39.

The square root of 1537812138 is about 39214.9478898034. The cubic root of 1537812138 is about 1154.2532201557.

Adding to 1537812138 its reverse (8312187351), we get a palindrome (9849999489).

The spelling of 1537812138 in words is "one billion, five hundred thirty-seven million, eight hundred twelve thousand, one hundred thirty-eight".