1538137692 has 288 divisors, whose sum is σ = 5004679680. Its totient is φ = 387555840.

The previous prime is 1538137691. The next prime is 1538137703. The reversal of 1538137692 is 2967318351.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1538137691) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 8592859 + ... + 8593037.

It is an arithmetic number, because the mean of its divisors is an integer number (17377360).

Almost surely, 2^1538137692 is an apocalyptic number.

1538137692 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 1538137692, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2502339840).

1538137692 is an abundant number, since it is smaller than the sum of its proper divisors (3466541988).

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

1538137692 is a wasteful number, since it uses less digits than its factorization.

1538137692 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 313 (or 308 counting only the distinct ones).

The product of its digits is 272160, while the sum is 45.

The square root of 1538137692 is about 39219.0985617977. The cubic root of 1538137692 is about 1154.3346660033.

The spelling of 1538137692 in words is "one billion, five hundred thirty-eight million, one hundred thirty-seven thousand, six hundred ninety-two".