1628186616 has 64 divisors (see below), whose sum is σ = 5168851200. Its totient is φ = 465195744.

The previous prime is 1628186587. The next prime is 1628186617. The reversal of 1628186616 is 6166818261.

1628186616 is a `hidden beast` number, since 1 + 6 + 28 + 1 + 8 + 6 + 616 = 666.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1628186617) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 536910 + ... + 539933.

It is an arithmetic number, because the mean of its divisors is an integer number (80763300).

Almost surely, 2^1628186616 is an apocalyptic number.

It is an amenable number.

1628186616 is an abundant number, since it is smaller than the sum of its proper divisors (3540664584).

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

1628186616 is a wasteful number, since it uses less digits than its factorization.

1628186616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1076865 (or 1076855 counting only the distinct ones).

The product of its digits is 165888, while the sum is 45.

The square root of 1628186616 is about 40350.7944903195. The cubic root of 1628186616 is about 1176.4353344538.

The spelling of 1628186616 in words is "one billion, six hundred twenty-eight million, one hundred eighty-six thousand, six hundred sixteen".