1018994688 has 224 divisors, whose sum is σ = 3208446720. Its totient is φ = 318504960.

The previous prime is 1018994687. The next prime is 1018994699. The reversal of 1018994688 is 8864998101.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (1018994687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3759993 + ... + 3760263.

Almost surely, 2^1018994688 is an apocalyptic number.

1018994688 is a gapful number since it is divisible by the number (18) 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 1018994688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1604223360).

1018994688 is an abundant number, since it is smaller than the sum of its proper divisors (2189452032).

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

1018994688 is an equidigital number, since it uses as much as digits as its factorization.

1018994688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 323 (or 293 counting only the distinct ones).

The product of its (nonzero) digits is 995328, while the sum is 54.

The square root of 1018994688 is about 31921.6961955345. The cubic root of 1018994688 is about 1006.2918917374.

The spelling of 1018994688 in words is "one billion, eighteen million, nine hundred ninety-four thousand, six hundred eighty-eight".