819201124 has 24 divisors (see below), whose sum is σ = 1661482368. Its totient is φ = 346140480.

The previous prime is 819201107. The next prime is 819201137. The reversal of 819201124 is 421102918.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 819201092 and 819201101.

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, 204049 + ... + 208024.

It is an arithmetic number, because the mean of its divisors is an integer number (69228432).

Almost surely, 2^819201124 is an apocalyptic number.

It is an amenable number.

819201124 is an abundant number, since it is smaller than the sum of its proper divisors (842281244).

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

819201124 is a wasteful number, since it uses less digits than its factorization.

819201124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 412155 (or 412153 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 28.

The square root of 819201124 is about 28621.6897474625. The cubic root of 819201124 is about 935.6861041701.

The spelling of 819201124 in words is "eight hundred nineteen million, two hundred one thousand, one hundred twenty-four".