13188890 has 64 divisors (see below), whose sum is σ = 29175552. Its totient is φ = 4224000.

The previous prime is 13188887. The next prime is 13188893. The reversal of 13188890 is 9888131.

13188890 = T₃₅₆ + T₃₅₇ + ... + T₄₉₈.

It is an interprime number because it is at equal distance from previous prime (13188887) and next prime (13188893).

It is not an unprimeable number, because it can be changed into a prime (13188893) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 32690 + ... + 33090.

It is an arithmetic number, because the mean of its divisors is an integer number (455868).

Almost surely, 2^13188890 is an apocalyptic number.

13188890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13188890 is an abundant number, since it is smaller than the sum of its proper divisors (15986662).

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

13188890 is a wasteful number, since it uses less digits than its factorization.

13188890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 455.

The product of its (nonzero) digits is 13824, while the sum is 38.

The square root of 13188890 is about 3631.6511396333. The cubic root of 13188890 is about 236.2668269045.

The spelling of 13188890 in words is "thirteen million, one hundred eighty-eight thousand, eight hundred ninety".