819421748 has 12 divisors (see below), whose sum is σ = 1434599712. Its totient is φ = 409536120.

The previous prime is 819421741. The next prime is 819421789. The reversal of 819421748 is 847124918.

It is a hoax number, since the sum of its digits (44) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 819421699 and 819421708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (819421741) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32840 + ... + 52127.

It is an arithmetic number, because the mean of its divisors is an integer number (119549976).

Almost surely, 2^819421748 is an apocalyptic number.

It is an amenable number.

819421748 is a deficient number, since it is larger than the sum of its proper divisors (615177964).

819421748 is a wasteful number, since it uses less digits than its factorization.

819421748 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87382 (or 87380 counting only the distinct ones).

The product of its digits is 129024, while the sum is 44.

The square root of 819421748 is about 28625.5436280257. The cubic root of 819421748 is about 935.7700950549.

The spelling of 819421748 in words is "eight hundred nineteen million, four hundred twenty-one thousand, seven hundred forty-eight".