819408478 has 48 divisors (see below), whose sum is σ = 1510600320. Its totient is φ = 332432856.

The previous prime is 819408467. The next prime is 819408503. The reversal of 819408478 is 874804918.

It is a Harshad number since it is a multiple of its sum of digits (49).

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 23 ways as a sum of consecutive naturals, for example, 638025 + ... + 639307.

It is an arithmetic number, because the mean of its divisors is an integer number (31470840).

Almost surely, 2^819408478 is an apocalyptic number.

819408478 is a deficient number, since it is larger than the sum of its proper divisors (691191842).

819408478 is an equidigital number, since it uses as much as digits as its factorization.

819408478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1339 (or 1311 counting only the distinct ones).

The product of its (nonzero) digits is 516096, while the sum is 49.

The square root of 819408478 is about 28625.3118410962. The cubic root of 819408478 is about 935.7650436325.

The spelling of 819408478 in words is "eight hundred nineteen million, four hundred eight thousand, four hundred seventy-eight".