1538680344 has 64 divisors (see below), whose sum is σ = 4059072000. Its totient is φ = 484709760.

The previous prime is 1538680343. The next prime is 1538680361. The reversal of 1538680344 is 4430868351.

It is a junction number, because it is equal to n+sod(n) for n = 1538680296 and 1538680305.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1538680343) 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, 192622 + ... + 200450.

It is an arithmetic number, because the mean of its divisors is an integer number (63423000).

Almost surely, 2^1538680344 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1538680344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2029536000).

1538680344 is an abundant number, since it is smaller than the sum of its proper divisors (2520391656).

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

1538680344 is a wasteful number, since it uses less digits than its factorization.

1538680344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8288 (or 8284 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 42.

The square root of 1538680344 is about 39226.0161627459. The cubic root of 1538680344 is about 1154.4703990543.

The spelling of 1538680344 in words is "one billion, five hundred thirty-eight million, six hundred eighty thousand, three hundred forty-four".