240020440 has 96 divisors (see below), whose sum is σ = 600702480. Its totient is φ = 86240000.

The previous prime is 240020419. The next prime is 240020447. The reversal of 240020440 is 44020042.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (240020447) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 488595 + ... + 489085.

Almost surely, 2^240020440 is an apocalyptic number.

240020440 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 240020440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (300351240).

240020440 is an abundant number, since it is smaller than the sum of its proper divisors (360682040).

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

240020440 is a wasteful number, since it uses less digits than its factorization.

240020440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 625 (or 610 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 16.

The square root of 240020440 is about 15492.5930689475. The cubic root of 240020440 is about 621.4641428656.

Adding to 240020440 its reverse (44020042), we get a palindrome (284040482).

The spelling of 240020440 in words is "two hundred forty million, twenty thousand, four hundred forty".