1018429440 has 304 divisors, whose sum is σ = 3825197952. Its totient is φ = 226492416.

The previous prime is 1018429411. The next prime is 1018429441. The reversal of 1018429440 is 449248101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1018429441) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27525102 + ... + 27525138.

It is an arithmetic number, because the mean of its divisors is an integer number (12582888).

Almost surely, 2^1018429440 is an apocalyptic number.

1018429440 is a gapful number since it is divisible by the number (10) 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 1018429440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1912598976).

1018429440 is an abundant number, since it is smaller than the sum of its proper divisors (2806768512).

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

1018429440 is an frugal number, since it uses more digits than its factorization.

1018429440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88 (or 54 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 33.

The square root of 1018429440 is about 31912.8413025227. The cubic root of 1018429440 is about 1006.1057901177.

The spelling of 1018429440 in words is "one billion, eighteen million, four hundred twenty-nine thousand, four hundred forty".