1018440864 has 120 divisors (see below), whose sum is σ = 3423153888. Its totient is φ = 290977920.

The previous prime is 1018440859. The next prime is 1018440877. The reversal of 1018440864 is 4680448101.

1018440864 is a `hidden beast` number, since 10 + 184 + 408 + 64 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

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 19 ways as a sum of consecutive naturals, for example, 9922 + ... + 46209.

Almost surely, 2^1018440864 is an apocalyptic number.

1018440864 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1018440864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1711576944).

1018440864 is an abundant number, since it is smaller than the sum of its proper divisors (2404713024).

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

1018440864 is an equidigital number, since it uses as much as digits as its factorization.

1018440864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56160 (or 56143 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 36.

The square root of 1018440864 is about 31913.0202895307. The cubic root of 1018440864 is about 1006.1095520244.

Adding to 1018440864 its reverse (4680448101), we get a palindrome (5698888965).

The spelling of 1018440864 in words is "one billion, eighteen million, four hundred forty thousand, eight hundred sixty-four".