235540140 has 96 divisors (see below), whose sum is σ = 724114944. Its totient is φ = 56732160.

The previous prime is 235540103. The next prime is 235540141. The reversal of 235540140 is 41045532.

It is a self number, because there is not a number n which added to its sum of digits gives 235540140.

It is not an unprimeable number, because it can be changed into a prime (235540141) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 109152 + ... + 111288.

It is an arithmetic number, because the mean of its divisors is an integer number (7542864).

Almost surely, 2^235540140 is an apocalyptic number.

235540140 is a gapful number since it is divisible by the number (20) 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 235540140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (362057472).

235540140 is an abundant number, since it is smaller than the sum of its proper divisors (488574804).

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

235540140 is a wasteful number, since it uses less digits than its factorization.

235540140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2327 (or 2325 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 235540140 is about 15347.3170293703. The cubic root of 235540140 is about 617.5730128334.

Adding to 235540140 its reverse (41045532), we get a palindrome (276585672).

The spelling of 235540140 in words is "two hundred thirty-five million, five hundred forty thousand, one hundred forty".