1938798830 has 32 divisors (see below), whose sum is σ = 3764859264. Its totient is φ = 716125696.

The previous prime is 1938798793. The next prime is 1938798839. The reversal of 1938798830 is 388978391.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1938798839) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 98582 + ... + 116601.

It is an arithmetic number, because the mean of its divisors is an integer number (117651852).

Almost surely, 2^1938798830 is an apocalyptic number.

1938798830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1938798830 is a deficient number, since it is larger than the sum of its proper divisors (1826060434).

1938798830 is a wasteful number, since it uses less digits than its factorization.

1938798830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215260.

The product of its (nonzero) digits is 2612736, while the sum is 56.

The square root of 1938798830 is about 44031.7933997697. The cubic root of 1938798830 is about 1246.9362472704.

The spelling of 1938798830 in words is "one billion, nine hundred thirty-eight million, seven hundred ninety-eight thousand, eight hundred thirty".