818973420 has 96 divisors (see below), whose sum is σ = 2400330240. Its totient is φ = 208243200.

The previous prime is 818973409. The next prime is 818973431. The reversal of 818973420 is 24379818.

It is an interprime number because it is at equal distance from previous prime (818973409) and next prime (818973431).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 563695 + ... + 565145.

It is an arithmetic number, because the mean of its divisors is an integer number (25003440).

Almost surely, 2^818973420 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 818973420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1200165120).

818973420 is an abundant number, since it is smaller than the sum of its proper divisors (1581356820).

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

818973420 is a wasteful number, since it uses less digits than its factorization.

818973420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1895 (or 1893 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 42.

The square root of 818973420 is about 28617.7116485578. The cubic root of 818973420 is about 935.5994021356.

The spelling of 818973420 in words is "eight hundred eighteen million, nine hundred seventy-three thousand, four hundred twenty".