1628666468 has 96 divisors (see below), whose sum is σ = 3523709952. Its totient is φ = 648460800.

The previous prime is 1628666443. The next prime is 1628666471. The reversal of 1628666468 is 8646668261.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (53).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 938930 + ... + 940662.

It is an arithmetic number, because the mean of its divisors is an integer number (36705312).

Almost surely, 2^1628666468 is an apocalyptic number.

It is an amenable number.

1628666468 is an abundant number, since it is smaller than the sum of its proper divisors (1895043484).

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

1628666468 is a wasteful number, since it uses less digits than its factorization.

1628666468 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1845 (or 1843 counting only the distinct ones).

The product of its digits is 3981312, while the sum is 53.

The square root of 1628666468 is about 40356.7400566498. The cubic root of 1628666468 is about 1176.5508943850.

The spelling of 1628666468 in words is "one billion, six hundred twenty-eight million, six hundred sixty-six thousand, four hundred sixty-eight".