1355344220 has 24 divisors (see below), whose sum is σ = 2855387808. Its totient is φ = 540392000.

The previous prime is 1355344183. The next prime is 1355344223. The reversal of 1355344220 is 224435531.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1355344223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 102731 + ... + 115170.

It is an arithmetic number, because the mean of its divisors is an integer number (118974492).

Almost surely, 2^1355344220 is an apocalyptic number.

1355344220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1355344220 is an abundant number, since it is smaller than the sum of its proper divisors (1500043588).

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

1355344220 is a wasteful number, since it uses less digits than its factorization.

1355344220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218221 (or 218219 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 29.

The square root of 1355344220 is about 36814.9999320929. Note that the first 4 decimals coincide. The cubic root of 1355344220 is about 1106.6659201056.

Adding to 1355344220 its reverse (224435531), we get a palindrome (1579779751).

The spelling of 1355344220 in words is "one billion, three hundred fifty-five million, three hundred forty-four thousand, two hundred twenty".