1669634028 has 36 divisors (see below), whose sum is σ = 4334533840. Its totient is φ = 541502496.

The previous prime is 1669634003. The next prime is 1669634047. The reversal of 1669634028 is 8204369661.

1669634028 is a `hidden beast` number, since 1 + 6 + 6 + 9 + 634 + 0 + 2 + 8 = 666.

1669634028 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (36).

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, 625408 + ... + 628071.

Almost surely, 2^1669634028 is an apocalyptic number.

1669634028 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1669634028 is an abundant number, since it is smaller than the sum of its proper divisors (2664899812).

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

1669634028 is a wasteful number, since it uses less digits than its factorization.

1669634028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1253526 (or 1253521 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 45.

The square root of 1669634028 is about 40861.1554902697. The cubic root of 1669634028 is about 1186.3343234961.

The spelling of 1669634028 in words is "one billion, six hundred sixty-nine million, six hundred thirty-four thousand, twenty-eight".