818001240 has 128 divisors (see below), whose sum is σ = 2969602560. Its totient is φ = 175970304.

The previous prime is 818001229. The next prime is 818001251. The reversal of 818001240 is 42100818.

It is an interprime number because it is at equal distance from previous prime (818001229) and next prime (818001251).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 818001240.

It is a congruent number.

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, 14362 + ... + 42921.

It is an arithmetic number, because the mean of its divisors is an integer number (23200020).

Almost surely, 2^818001240 is an apocalyptic number.

It is an amenable number.

818001240 is an abundant number, since it is smaller than the sum of its proper divisors (2151601320).

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

818001240 is a wasteful number, since it uses less digits than its factorization.

818001240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57321 (or 57317 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 24.

The square root of 818001240 is about 28600.7209699336. The cubic root of 818001240 is about 935.2290477583.

The spelling of 818001240 in words is "eight hundred eighteen million, one thousand, two hundred forty".