1355888890 has 16 divisors (see below), whose sum is σ = 2584165032. Its totient is φ = 510452224.

The previous prime is 1355888867. The next prime is 1355888899. The reversal of 1355888890 is 988885531.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1349901081 + 5987809 = 36741^2 + 2447^2 .

It is not an unprimeable number, because it can be changed into a prime (1355888899) 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, 3987739 + ... + 3988078.

Almost surely, 2^1355888890 is an apocalyptic number.

1355888890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1355888890 is a deficient number, since it is larger than the sum of its proper divisors (1228276142).

1355888890 is a wasteful number, since it uses less digits than its factorization.

1355888890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7975841.

The product of its (nonzero) digits is 2764800, while the sum is 55.

The square root of 1355888890 is about 36822.3965814285. The cubic root of 1355888890 is about 1106.8141449357.

The spelling of 1355888890 in words is "one billion, three hundred fifty-five million, eight hundred eighty-eight thousand, eight hundred ninety".