838203840 has 84 divisors (see below), whose sum is σ = 2883081864. Its totient is φ = 223520256.

The previous prime is 838203799. The next prime is 838203871. The reversal of 838203840 is 48302838.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 838203795 and 838203804.

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 11 ways as a sum of consecutive naturals, for example, 142642 + ... + 148401.

Almost surely, 2^838203840 is an apocalyptic number.

838203840 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

838203840 is an abundant number, since it is smaller than the sum of its proper divisors (2044878024).

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

838203840 is a wasteful number, since it uses less digits than its factorization.

838203840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 291066 (or 291053 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 36.

The square root of 838203840 is about 28951.7502061620. The cubic root of 838203840 is about 942.8657976380.

The spelling of 838203840 in words is "eight hundred thirty-eight million, two hundred three thousand, eight hundred forty".