240231440 has 40 divisors (see below), whose sum is σ = 587938560. Its totient is φ = 91034496.

The previous prime is 240231427. The next prime is 240231443. The reversal of 240231440 is 44132042.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×240231440² = 115422289528947200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (240231443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77504 + ... + 80543.

It is an arithmetic number, because the mean of its divisors is an integer number (14698464).

Almost surely, 2^240231440 is an apocalyptic number.

240231440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

240231440 is an abundant number, since it is smaller than the sum of its proper divisors (347707120).

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

240231440 is a wasteful number, since it uses less digits than its factorization.

240231440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158079 (or 158073 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 240231440 is about 15499.4012787591. The cubic root of 240231440 is about 621.6461975386.

Adding to 240231440 its reverse (44132042), we get a palindrome (284363482).

The spelling of 240231440 in words is "two hundred forty million, two hundred thirty-one thousand, four hundred forty".