626349390 has 16 divisors (see below), whose sum is σ = 1503238608. Its totient is φ = 167026496.

The previous prime is 626349329. The next prime is 626349397. The reversal of 626349390 is 93943626.

626349390 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (42) 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 (626349397) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10439127 + ... + 10439186.

It is an arithmetic number, because the mean of its divisors is an integer number (93952413).

Almost surely, 2^626349390 is an apocalyptic number.

626349390 is an abundant number, since it is smaller than the sum of its proper divisors (876889218).

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

626349390 is a wasteful number, since it uses less digits than its factorization.

626349390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20878323.

The product of its (nonzero) digits is 209952, while the sum is 42.

The square root of 626349390 is about 25026.9732488769. The cubic root of 626349390 is about 855.6028442281.

The spelling of 626349390 in words is "six hundred twenty-six million, three hundred forty-nine thousand, three hundred ninety".