1628266680 has 48 divisors (see below), whose sum is σ = 5291867880. Its totient is φ = 434204352.

The previous prime is 1628266657. The next prime is 1628266691. The reversal of 1628266680 is 866628261.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2261122 + ... + 2261841.

Almost surely, 2^1628266680 is an apocalyptic number.

1628266680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1628266680 is an abundant number, since it is smaller than the sum of its proper divisors (3663601200).

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

1628266680 is a wasteful number, since it uses less digits than its factorization.

1628266680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4522980 (or 4522973 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 45.

The square root of 1628266680 is about 40351.7865775482. The cubic root of 1628266680 is about 1176.4546173734.

The spelling of 1628266680 in words is "one billion, six hundred twenty-eight million, two hundred sixty-six thousand, six hundred eighty".