626440413 has 4 divisors (see below), whose sum is σ = 835253888. Its totient is φ = 417626940.

The previous prime is 626440387. The next prime is 626440417. The reversal of 626440413 is 314044626.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 626440413 - 2¹⁰ = 626439389 is a prime.

It is a super-2 number, since 2×626440413² = 784855182079221138, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (626440417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 104406733 + ... + 104406738.

It is an arithmetic number, because the mean of its divisors is an integer number (208813472).

Almost surely, 2^626440413 is an apocalyptic number.

It is an amenable number.

626440413 is a deficient number, since it is larger than the sum of its proper divisors (208813475).

626440413 is a wasteful number, since it uses less digits than its factorization.

626440413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208813474.

The product of its (nonzero) digits is 13824, while the sum is 30.

The square root of 626440413 is about 25028.7916807824. The cubic root of 626440413 is about 855.6442884905.

The spelling of 626440413 in words is "six hundred twenty-six million, four hundred forty thousand, four hundred thirteen".