626408431 has 16 divisors (see below), whose sum is σ = 698090400. Its totient is φ = 557240320.

The previous prime is 626408429. The next prime is 626408479. The reversal of 626408431 is 134804626.

It is a cyclic number.

It is not a de Polignac number, because 626408431 - 2¹ = 626408429 is a prime.

It is a super-2 number, since 2×626408431² = 784775044855763522, 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 (626408411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 260571 + ... + 262963.

It is an arithmetic number, because the mean of its divisors is an integer number (43630650).

Almost surely, 2^626408431 is an apocalyptic number.

626408431 is a deficient number, since it is larger than the sum of its proper divisors (71681969).

626408431 is a wasteful number, since it uses less digits than its factorization.

626408431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2906.

The product of its (nonzero) digits is 27648, while the sum is 34.

The square root of 626408431 is about 25028.1527684326. The cubic root of 626408431 is about 855.6297270197.

The spelling of 626408431 in words is "six hundred twenty-six million, four hundred eight thousand, four hundred thirty-one".