1018990816 has 24 divisors (see below), whose sum is σ = 2006918424. Its totient is φ = 509297280.

The previous prime is 1018990813. The next prime is 1018990837. The reversal of 1018990816 is 6180998101.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1018990813) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 112206 + ... + 120946.

It is an arithmetic number, because the mean of its divisors is an integer number (83621601).

Almost surely, 2^1018990816 is an apocalyptic number.

1018990816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1018990816 is a deficient number, since it is larger than the sum of its proper divisors (987927608).

1018990816 is an equidigital number, since it uses as much as digits as its factorization.

1018990816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12394 (or 12386 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 43.

The square root of 1018990816 is about 31921.6355470706. The cubic root of 1018990816 is about 1006.2906171586.

The spelling of 1018990816 in words is "one billion, eighteen million, nine hundred ninety thousand, eight hundred sixteen".