626221406 has 8 divisors (see below), whose sum is σ = 943075224. Its totient is φ = 311863000.

The previous prime is 626221397. The next prime is 626221417. The reversal of 626221406 is 604122626.

626221406 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 623225 + ... + 624228.

It is an arithmetic number, because the mean of its divisors is an integer number (117884403).

Almost surely, 2^626221406 is an apocalyptic number.

626221406 is a deficient number, since it is larger than the sum of its proper divisors (316853818).

626221406 is a wasteful number, since it uses less digits than its factorization.

626221406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1247706.

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 626221406 is about 25024.4161969865. The cubic root of 626221406 is about 855.5445642248.

The spelling of 626221406 in words is "six hundred twenty-six million, two hundred twenty-one thousand, four hundred six".