6550390 has 64 divisors (see below), whose sum is σ = 15095808. Its totient is φ = 1987200.

The previous prime is 6550367. The next prime is 6550403. The reversal of 6550390 is 930556.

6550390 = T₁₁ + T₁₂ + ... + T₃₃₉.

It is a happy number.

6550390 is a nontrivial binomial coefficient, being equal to C(3620, 2).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 36100 + ... + 36280.

It is an arithmetic number, because the mean of its divisors is an integer number (235872).

Almost surely, 2^6550390 is an apocalyptic number.

6550390 is the 3619-th triangular number and also the 1810-th hexagonal number.

6550390 is the 1207-th centered nonagonal number.

6550390 is an abundant number, since it is smaller than the sum of its proper divisors (8545418).

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

6550390 is a wasteful number, since it uses less digits than its factorization.

6550390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253.

The product of its (nonzero) digits is 4050, while the sum is 28.

The square root of 6550390 is about 2559.3729700847. The cubic root of 6550390 is about 187.1065765548.

The spelling of 6550390 in words is "six million, five hundred fifty thousand, three hundred ninety".