1936590138 has 144 divisors (see below), whose sum is σ = 5021976960. Its totient is φ = 528239232.

The previous prime is 1936590137. The next prime is 1936590167. The reversal of 1936590138 is 8310956391.

1936590138 is a `hidden beast` number, since 19 + 36 + 590 + 13 + 8 = 666.

1936590138 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 1936590093 and 1936590102.

It is not an unprimeable number, because it can be changed into a prime (1936590137) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 17766828 + ... + 17766936.

It is an arithmetic number, because the mean of its divisors is an integer number (34874840).

Almost surely, 2^1936590138 is an apocalyptic number.

1936590138 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1936590138, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2510988480).

1936590138 is an abundant number, since it is smaller than the sum of its proper divisors (3085386822).

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

1936590138 is a wasteful number, since it uses less digits than its factorization.

1936590138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 301 (or 261 counting only the distinct ones).

The product of its (nonzero) digits is 174960, while the sum is 45.

The square root of 1936590138 is about 44006.7056026692. The cubic root of 1936590138 is about 1246.4625614394.

The spelling of 1936590138 in words is "one billion, nine hundred thirty-six million, five hundred ninety thousand, one hundred thirty-eight".