1220040155340 has 168 divisors, whose sum is σ = 3887654642928. Its totient is φ = 321423914880.

The previous prime is 1220040155339. The next prime is 1220040155363. The reversal of 1220040155340 is 435510400221.

1220040155340 is a `hidden beast` number, since 1 + 2 + 200 + 401 + 5 + 53 + 4 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 706050 + ... + 1714230.

It is an arithmetic number, because the mean of its divisors is an integer number (23140801446).

Almost surely, 2^{1220040155340} is an apocalyptic number.

1220040155340 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 1220040155340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1943827321464).

1220040155340 is an abundant number, since it is smaller than the sum of its proper divisors (2667614487588).

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

1220040155340 is a wasteful number, since it uses less digits than its factorization.

1220040155340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1008291 (or 1008274 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

Adding to 1220040155340 its reverse (435510400221), we get a palindrome (1655550555561).

The spelling of 1220040155340 in words is "one trillion, two hundred twenty billion, forty million, one hundred fifty-five thousand, three hundred forty".