818820470 has 128 divisors (see below), whose sum is σ = 1783192320. Its totient is φ = 267632640.

The previous prime is 818820463. The next prime is 818820547. The reversal of 818820470 is 74028818.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4523780 + ... + 4523960.

It is an arithmetic number, because the mean of its divisors is an integer number (13931190).

Almost surely, 2^818820470 is an apocalyptic number.

818820470 is an abundant number, since it is smaller than the sum of its proper divisors (964371850).

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

818820470 is a wasteful number, since it uses less digits than its factorization.

818820470 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330.

The product of its (nonzero) digits is 28672, while the sum is 38.

The square root of 818820470 is about 28615.0392276509. The cubic root of 818820470 is about 935.5411548900.

The spelling of 818820470 in words is "eight hundred eighteen million, eight hundred twenty thousand, four hundred seventy".