1934478138 has 16 divisors (see below), whose sum is σ = 3869442720. Its totient is φ = 644744976.

The previous prime is 1934478137. The next prime is 1934478163. The reversal of 1934478138 is 8318744391.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1934478131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50368 + ... + 80036.

It is an arithmetic number, because the mean of its divisors is an integer number (241840170).

Almost surely, 2^1934478138 is an apocalyptic number.

1934478138 is an abundant number, since it is smaller than the sum of its proper divisors (1934964582).

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

1934478138 is a wasteful number, since it uses less digits than its factorization.

1934478138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40541.

The product of its digits is 580608, while the sum is 48.

The square root of 1934478138 is about 43982.7027136805. The cubic root of 1934478138 is about 1246.0092756271.

The spelling of 1934478138 in words is "one billion, nine hundred thirty-four million, four hundred seventy-eight thousand, one hundred thirty-eight".