65890190 has 32 divisors (see below), whose sum is σ = 125300736. Its totient is φ = 24907680.

The previous prime is 65890189. The next prime is 65890199. The reversal of 65890190 is 9109856.

It is a super-2 number, since 2×65890190² = 8683034276472200, which contains 22 as substring.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65890199) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10859 + ... + 15801.

It is an arithmetic number, because the mean of its divisors is an integer number (3915648).

Almost surely, 2^65890190 is an apocalyptic number.

65890190 is a deficient number, since it is larger than the sum of its proper divisors (59410546).

65890190 is a wasteful number, since it uses less digits than its factorization.

65890190 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5024.

The product of its (nonzero) digits is 19440, while the sum is 38.

The square root of 65890190 is about 8117.2772528724. The cubic root of 65890190 is about 403.8997521094.

The spelling of 65890190 in words is "sixty-five million, eight hundred ninety thousand, one hundred ninety".