983715840 has 260 divisors, whose sum is σ = 3532319604. Its totient is φ = 261881856.

The previous prime is 983715833. The next prime is 983715841. The reversal of 983715840 is 48517389.

It can be written as a sum of positive squares in 2 ways, for example, as 479084544 + 504631296 = 21888^2 + 22464^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (983715841) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1658584 + ... + 1659176.

Almost surely, 2^983715840 is an apocalyptic number.

983715840 is a gapful number since it is divisible by the number (90) 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 983715840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1766159802).

983715840 is an abundant number, since it is smaller than the sum of its proper divisors (2548603764).

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

983715840 is an equidigital number, since it uses as much as digits as its factorization.

983715840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 634 (or 603 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 45.

The square root of 983715840 is about 31364.2446107028. The cubic root of 983715840 is about 994.5422134235.

The spelling of 983715840 in words is "nine hundred eighty-three million, seven hundred fifteen thousand, eight hundred forty".