1355911890 has 16 divisors (see below), whose sum is σ = 3254188608. Its totient is φ = 361576496.

The previous prime is 1355911889. The next prime is 1355911903. The reversal of 1355911890 is 981195531.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22598502 + ... + 22598561.

It is an arithmetic number, because the mean of its divisors is an integer number (203386788).

Almost surely, 2^1355911890 is an apocalyptic number.

1355911890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1355911890 is an abundant number, since it is smaller than the sum of its proper divisors (1898276718).

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

1355911890 is a wasteful number, since it uses less digits than its factorization.

1355911890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45197073.

The product of its (nonzero) digits is 48600, while the sum is 42.

The square root of 1355911890 is about 36822.7088900314. The cubic root of 1355911890 is about 1106.8204032119.

The spelling of 1355911890 in words is "one billion, three hundred fifty-five million, nine hundred eleven thousand, eight hundred ninety".