1669904900 has 72 divisors (see below), whose sum is σ = 3960746496. Its totient is φ = 608371200.

The previous prime is 1669904897. The next prime is 1669904911. The reversal of 1669904900 is 94099661.

It is a hoax number, since the sum of its digits (44) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 36857 + ... + 68543.

It is an arithmetic number, because the mean of its divisors is an integer number (55010368).

Almost surely, 2^1669904900 is an apocalyptic number.

1669904900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1669904900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1980373248).

1669904900 is an abundant number, since it is smaller than the sum of its proper divisors (2290841596).

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

1669904900 is a wasteful number, since it uses less digits than its factorization.

1669904900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31749 (or 31742 counting only the distinct ones).

The product of its (nonzero) digits is 104976, while the sum is 44.

The square root of 1669904900 is about 40864.4698974549. The cubic root of 1669904900 is about 1186.3984747551.

The spelling of 1669904900 in words is "one billion, six hundred sixty-nine million, nine hundred four thousand, nine hundred".