13555890 has 32 divisors (see below), whose sum is σ = 36149760. Its totient is φ = 3614832.

The previous prime is 13555877. The next prime is 13555921. The reversal of 13555890 is 9855531.

It is a happy number.

13555890 is a `hidden beast` number, since 13 + 5 + 558 + 90 = 666.

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 15 ways as a sum of consecutive naturals, for example, 24834 + ... + 25373.

It is an arithmetic number, because the mean of its divisors is an integer number (1129680).

Almost surely, 2^13555890 is an apocalyptic number.

13555890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13555890 is an abundant number, since it is smaller than the sum of its proper divisors (22593870).

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

13555890 is a wasteful number, since it uses less digits than its factorization.

13555890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50223 (or 50217 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 36.

The square root of 13555890 is about 3681.8324242149. The cubic root of 13555890 is about 238.4382973961.

The spelling of 13555890 in words is "thirteen million, five hundred fifty-five thousand, eight hundred ninety".