838645428 has 24 divisors (see below), whose sum is σ = 2071948032. Its totient is φ = 263104384.

The previous prime is 838645417. The next prime is 838645459. The reversal of 838645428 is 824546838.

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, 2055300 + ... + 2055707.

It is an arithmetic number, because the mean of its divisors is an integer number (86331168).

Almost surely, 2^838645428 is an apocalyptic number.

It is an amenable number.

838645428 is an abundant number, since it is smaller than the sum of its proper divisors (1233302604).

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

838645428 is a wasteful number, since it uses less digits than its factorization.

838645428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4111031 (or 4111029 counting only the distinct ones).

The product of its digits is 1474560, while the sum is 48.

The square root of 838645428 is about 28959.3754766915. The cubic root of 838645428 is about 943.0313441344.

The spelling of 838645428 in words is "eight hundred thirty-eight million, six hundred forty-five thousand, four hundred twenty-eight".