1595978538 has 64 divisors (see below), whose sum is σ = 3987145728. Its totient is φ = 413752320.

The previous prime is 1595978537. The next prime is 1595978543. The reversal of 1595978538 is 8358795951.

It is not an unprimeable number, because it can be changed into a prime (1595978537) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 263581 + ... + 269567.

It is an arithmetic number, because the mean of its divisors is an integer number (62299152).

Almost surely, 2^1595978538 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1595978538, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1993572864).

1595978538 is an abundant number, since it is smaller than the sum of its proper divisors (2391167190).

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

1595978538 is a wasteful number, since it uses less digits than its factorization.

1595978538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6587.

The product of its digits is 13608000, while the sum is 60.

The square root of 1595978538 is about 39949.7000989995. The cubic root of 1595978538 is about 1168.6263709852.

The spelling of 1595978538 in words is "one billion, five hundred ninety-five million, nine hundred seventy-eight thousand, five hundred thirty-eight".