240664226440 has 64 divisors (see below), whose sum is σ = 591543648000. Its totient is φ = 87392432640.

The previous prime is 240664226353. The next prime is 240664226477. The reversal of 240664226440 is 44622466042.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 240664226393 and 240664226402.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64005 + ... + 696724.

It is an arithmetic number, because the mean of its divisors is an integer number (9242869500).

Almost surely, 2^240664226440 is an apocalyptic number.

240664226440 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 240664226440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (295771824000).

240664226440 is an abundant number, since it is smaller than the sum of its proper divisors (350879421560).

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

240664226440 is a wasteful number, since it uses less digits than its factorization.

240664226440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 761470 (or 761466 counting only the distinct ones).

The product of its (nonzero) digits is 442368, while the sum is 40.

The spelling of 240664226440 in words is "two hundred forty billion, six hundred sixty-four million, two hundred twenty-six thousand, four hundred forty".