1626287916 has 72 divisors (see below), whose sum is σ = 4199554800. Its totient is φ = 489441920.

The previous prime is 1626287911. The next prime is 1626287921. The reversal of 1626287916 is 6197826261.

It is an interprime number because it is at equal distance from previous prime (1626287911) and next prime (1626287921).

It is not an unprimeable number, because it can be changed into a prime (1626287911) 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 23 ways as a sum of consecutive naturals, for example, 212590 + ... + 220106.

It is an arithmetic number, because the mean of its divisors is an integer number (58327150).

Almost surely, 2^1626287916 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1626287916, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2099777400).

1626287916 is an abundant number, since it is smaller than the sum of its proper divisors (2573266884).

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

1626287916 is a wasteful number, since it uses less digits than its factorization.

1626287916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7695 (or 7682 counting only the distinct ones).

The product of its digits is 435456, while the sum is 48.

The square root of 1626287916 is about 40327.2602094415. The cubic root of 1626287916 is about 1175.9778589242.

The spelling of 1626287916 in words is "one billion, six hundred twenty-six million, two hundred eighty-seven thousand, nine hundred sixteen".