235312440 has 128 divisors (see below), whose sum is σ = 779155200. Its totient is φ = 56376320.

The previous prime is 235312423. The next prime is 235312447. The reversal of 235312440 is 44213532.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 235312440.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (235312447) 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, 116479 + ... + 118481.

It is an arithmetic number, because the mean of its divisors is an integer number (6087150).

Almost surely, 2^235312440 is an apocalyptic number.

235312440 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 235312440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (389577600).

235312440 is an abundant number, since it is smaller than the sum of its proper divisors (543842760).

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

235312440 is a wasteful number, since it uses less digits than its factorization.

235312440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2117 (or 2113 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 24.

The square root of 235312440 is about 15339.8970009580. The cubic root of 235312440 is about 617.3739431364.

Adding to 235312440 its reverse (44213532), we get a palindrome (279525972).

The spelling of 235312440 in words is "two hundred thirty-five million, three hundred twelve thousand, four hundred forty".