1355420440 has 64 divisors (see below), whose sum is σ = 3434296320. Its totient is φ = 476976000.

The previous prime is 1355420431. The next prime is 1355420477. The reversal of 1355420440 is 440245531.

It is a junction number, because it is equal to n+sod(n) for n = 1355420399 and 1355420408.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36046 + ... + 63325.

It is an arithmetic number, because the mean of its divisors is an integer number (53660880).

Almost surely, 2^1355420440 is an apocalyptic number.

1355420440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1355420440 is an abundant number, since it is smaller than the sum of its proper divisors (2078875880).

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

1355420440 is a wasteful number, since it uses less digits than its factorization.

1355420440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99424 (or 99420 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 28.

The square root of 1355420440 is about 36816.0350934209. The cubic root of 1355420440 is about 1106.6866647731.

Adding to 1355420440 its reverse (440245531), we get a palindrome (1795665971).

The spelling of 1355420440 in words is "one billion, three hundred fifty-five million, four hundred twenty thousand, four hundred forty".