1892381438 has 8 divisors (see below), whose sum is σ = 2838835080. Its totient is φ = 946103080.

The previous prime is 1892381431. The next prime is 1892381461. The reversal of 1892381438 is 8341832981.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×1892381438² = 7162215013773895688, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a junction number, because it is equal to n+sod(n) for n = 1892381392 and 1892381401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1892381431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12293 + ... + 62736.

It is an arithmetic number, because the mean of its divisors is an integer number (354854385).

Almost surely, 2^1892381438 is an apocalyptic number.

1892381438 is a deficient number, since it is larger than the sum of its proper divisors (946453642).

1892381438 is a wasteful number, since it uses less digits than its factorization.

1892381438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87642.

The product of its digits is 331776, while the sum is 47.

The square root of 1892381438 is about 43501.5107553749. The cubic root of 1892381438 is about 1236.9046622237.

The spelling of 1892381438 in words is "one billion, eight hundred ninety-two million, three hundred eighty-one thousand, four hundred thirty-eight".