1427638194 has 12 divisors (see below), whose sum is σ = 3093216126. Its totient is φ = 475879392.

The previous prime is 1427638193. The next prime is 1427638213. The reversal of 1427638194 is 4918367241.

1427638194 is a `hidden beast` number, since 1 + 4 + 2 + 7 + 638 + 1 + 9 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1056575025 + 371063169 = 32505^2 + 19263^2 .

It is not an unprimeable number, because it can be changed into a prime (1427638193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 39656599 + ... + 39656634.

Almost surely, 2^1427638194 is an apocalyptic number.

1427638194 is an abundant number, since it is smaller than the sum of its proper divisors (1665577932).

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

1427638194 is a wasteful number, since it uses less digits than its factorization.

1427638194 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79313241 (or 79313238 counting only the distinct ones).

The product of its digits is 290304, while the sum is 45.

The square root of 1427638194 is about 37784.0997510858. The cubic root of 1427638194 is about 1126.0025812139.

The spelling of 1427638194 in words is "one billion, four hundred twenty-seven million, six hundred thirty-eight thousand, one hundred ninety-four".