1938131830 has 8 divisors (see below), whose sum is σ = 3488637312. Its totient is φ = 775252728.

The previous prime is 1938131827. The next prime is 1938131843. The reversal of 1938131830 is 381318391.

It is a happy number.

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

It is a self number, because there is not a number n which added to its sum of digits gives 1938131830.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 96906582 + ... + 96906601.

It is an arithmetic number, because the mean of its divisors is an integer number (436079664).

Almost surely, 2^1938131830 is an apocalyptic number.

1938131830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1938131830 is a deficient number, since it is larger than the sum of its proper divisors (1550505482).

1938131830 is a wasteful number, since it uses less digits than its factorization.

1938131830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193813190.

The product of its (nonzero) digits is 15552, while the sum is 37.

The square root of 1938131830 is about 44024.2186756335. The cubic root of 1938131830 is about 1246.7932374407.

The spelling of 1938131830 in words is "one billion, nine hundred thirty-eight million, one hundred thirty-one thousand, eight hundred thirty".