1018197840 has 320 divisors, whose sum is σ = 3702620160. Its totient is φ = 228833280.

The previous prime is 1018197823. The next prime is 1018197853. The reversal of 1018197840 is 487918101.

1018197840 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2658289 + ... + 2658671.

It is an arithmetic number, because the mean of its divisors is an integer number (11570688).

Almost surely, 2^1018197840 is an apocalyptic number.

1018197840 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 1018197840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1851310080).

1018197840 is an abundant number, since it is smaller than the sum of its proper divisors (2684422320).

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

1018197840 is a wasteful number, since it uses less digits than its factorization.

1018197840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 482 (or 476 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 39.

The square root of 1018197840 is about 31909.2124628609. The cubic root of 1018197840 is about 1006.0295185054.

The spelling of 1018197840 in words is "one billion, eighteen million, one hundred ninety-seven thousand, eight hundred forty".