1244212644240 has 60 divisors (see below), whose sum is σ = 4178480799324. Its totient is φ = 331790038272.

The previous prime is 1244212644221. The next prime is 1244212644287. The reversal of 1244212644240 is 424462124421.

1244212644240 is a `hidden beast` number, since 1 + 2 + 4 + 4 + 2 + 1 + 2 + 644 + 2 + 4 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 865190184336 + 379022459904 = 930156^2 + 615648^2 .

It is a tau number, because it is divible by the number of its divisors (60).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 1244212644195 and 1244212644204.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 864035839 + ... + 864037278.

Almost surely, 2^{1244212644240} is an apocalyptic number.

1244212644240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1244212644240 is an abundant number, since it is smaller than the sum of its proper divisors (2934268155084).

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

1244212644240 is a wasteful number, since it uses less digits than its factorization.

1244212644240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1728073136 (or 1728073127 counting only the distinct ones).

The product of its (nonzero) digits is 98304, while the sum is 36.

Adding to 1244212644240 its reverse (424462124421), we get a palindrome (1668674768661).

The spelling of 1244212644240 in words is "one trillion, two hundred forty-four billion, two hundred twelve million, six hundred forty-four thousand, two hundred forty".