1538272512 has 144 divisors (see below), whose sum is σ = 5198954880. Its totient is φ = 439492608.

The previous prime is 1538272507. The next prime is 1538272513. The reversal of 1538272512 is 2152728351.

1538272512 is a `hidden beast` number, since 1 + 538 + 2 + 72 + 51 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1538272513) 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, 32488 + ... + 64280.

Almost surely, 2^1538272512 is an apocalyptic number.

1538272512 is a gapful number since it is divisible by the number (12) 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 1538272512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2599477440).

1538272512 is an abundant number, since it is smaller than the sum of its proper divisors (3660682368).

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

1538272512 is an equidigital number, since it uses as much as digits as its factorization.

1538272512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31825 (or 31805 counting only the distinct ones).

The product of its digits is 33600, while the sum is 36.

The square root of 1538272512 is about 39220.8173295764. The cubic root of 1538272512 is about 1154.3683913873.

The spelling of 1538272512 in words is "one billion, five hundred thirty-eight million, two hundred seventy-two thousand, five hundred twelve".