938193820 has 24 divisors (see below), whose sum is σ = 1993947984. Its totient is φ = 370755456.

The previous prime is 938193811. The next prime is 938193833. The reversal of 938193820 is 28391839.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 280929 + ... + 284248.

It is an arithmetic number, because the mean of its divisors is an integer number (83081166).

Almost surely, 2^938193820 is an apocalyptic number.

It is an amenable number.

938193820 is an abundant number, since it is smaller than the sum of its proper divisors (1055754164).

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

938193820 is a wasteful number, since it uses less digits than its factorization.

938193820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 565269 (or 565267 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 43.

The square root of 938193820 is about 30629.9497224530. The cubic root of 938193820 is about 978.9582919522.

The spelling of 938193820 in words is "nine hundred thirty-eight million, one hundred ninety-three thousand, eight hundred twenty".