1420244433540 has 144 divisors (see below), whose sum is σ = 4496310314496. Its totient is φ = 362190470400.

The previous prime is 1420244433533. The next prime is 1420244433581. The reversal of 1420244433540 is 453344420241.

1420244433540 is a `hidden beast` number, since 1 + 4 + 20 + 24 + 44 + 33 + 540 = 666.

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 = 1420244433495 and 1420244433504.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 21623550 + ... + 21689130.

It is an arithmetic number, because the mean of its divisors is an integer number (31224377184).

Almost surely, 2^{1420244433540} is an apocalyptic number.

1420244433540 is a gapful number since it is divisible by the number (10) 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 1420244433540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2248155157248).

1420244433540 is an abundant number, since it is smaller than the sum of its proper divisors (3076065880956).

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

1420244433540 is a wasteful number, since it uses less digits than its factorization.

1420244433540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70850 (or 70845 counting only the distinct ones).

The product of its (nonzero) digits is 184320, while the sum is 36.

Adding to 1420244433540 its reverse (453344420241), we get a palindrome (1873588853781).

The spelling of 1420244433540 in words is "one trillion, four hundred twenty billion, two hundred forty-four million, four hundred thirty-three thousand, five hundred forty".