985029840 has 120 divisors (see below), whose sum is σ = 3326974560. Its totient is φ = 261172992.

The previous prime is 985029833. The next prime is 985029841. The reversal of 985029840 is 48920589.

It is a tau number, because it is divible by the number of its divisors (120).

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 (985029841) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 125059 + ... + 132701.

It is an arithmetic number, because the mean of its divisors is an integer number (27724788).

Almost surely, 2^985029840 is an apocalyptic number.

985029840 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 985029840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1663487280).

985029840 is an abundant number, since it is smaller than the sum of its proper divisors (2341944720).

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

985029840 is a wasteful number, since it uses less digits than its factorization.

985029840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7841 (or 7832 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 45.

The square root of 985029840 is about 31385.1850400790. The cubic root of 985029840 is about 994.9848368522.

The spelling of 985029840 in words is "nine hundred eighty-five million, twenty-nine thousand, eight hundred forty".