235440040 has 128 divisors (see below), whose sum is σ = 612541440. Its totient is φ = 80640000.

The previous prime is 235440017. The next prime is 235440043. The reversal of 235440040 is 40044532.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 235439993 and 235440020.

It is not an unprimeable number, because it can be changed into a prime (235440043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 559030 + ... + 559450.

It is an arithmetic number, because the mean of its divisors is an integer number (4785480).

Almost surely, 2^235440040 is an apocalyptic number.

235440040 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 235440040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (306270720).

235440040 is an abundant number, since it is smaller than the sum of its proper divisors (377101400).

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

235440040 is a wasteful number, since it uses less digits than its factorization.

235440040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 515 (or 511 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 22.

The square root of 235440040 is about 15344.0555264897. The cubic root of 235440040 is about 617.4855149121.

Adding to 235440040 its reverse (40044532), we get a palindrome (275484572).

The spelling of 235440040 in words is "two hundred thirty-five million, four hundred forty thousand, forty".