6420190 has 32 divisors (see below), whose sum is σ = 13535424. Its totient is φ = 2146560.

The previous prime is 6420173. The next prime is 6420199. The reversal of 6420190 is 910246.

6420190 = T₅₃₉ + T₅₄₀ + ... + T₅₇₉.

It is a super-2 number, since 2×6420190² = 82437679272200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6420199) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1752 + ... + 3988.

It is an arithmetic number, because the mean of its divisors is an integer number (422982).

Almost surely, 2^6420190 is an apocalyptic number.

6420190 is an abundant number, since it is smaller than the sum of its proper divisors (7115234).

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

6420190 is a wasteful number, since it uses less digits than its factorization.

6420190 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2292.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 6420190 is about 2533.8093850959. The cubic root of 6420190 is about 185.8585852302.

The spelling of 6420190 in words is "six million, four hundred twenty thousand, one hundred ninety".