6221390 has 64 divisors (see below), whose sum is σ = 13713408. Its totient is φ = 1987200.

The previous prime is 6221377. The next prime is 6221429. The reversal of 6221390 is 931226.

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, 101960 + ... + 102020.

It is an arithmetic number, because the mean of its divisors is an integer number (214272).

Almost surely, 2^6221390 is an apocalyptic number.

6221390 is an abundant number, since it is smaller than the sum of its proper divisors (7492018).

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

6221390 is a wasteful number, since it uses less digits than its factorization.

6221390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153.

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 6221390 is about 2494.2714367125. The cubic root of 6221390 is about 183.9200779240.

The spelling of 6221390 in words is "six million, two hundred twenty-one thousand, three hundred ninety".