1235985000 has 320 divisors, whose sum is σ = 4230895680. Its totient is φ = 299520000.

The previous prime is 1235984987. The next prime is 1235985001. The reversal of 1235985000 is 5895321.

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (1235985001) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 9434935 + ... + 9435065.

It is an arithmetic number, because the mean of its divisors is an integer number (13221549).

Almost surely, 2^1235985000 is an apocalyptic number.

1235985000 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 1235985000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2115447840).

1235985000 is an abundant number, since it is smaller than the sum of its proper divisors (2994910680).

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

1235985000 is a wasteful number, since it uses less digits than its factorization.

1235985000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214 (or 195 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 33.

The square root of 1235985000 is about 35156.5783318002. The cubic root of 1235985000 is about 1073.1762840916.

The spelling of 1235985000 in words is "one billion, two hundred thirty-five million, nine hundred eighty-five thousand".