1900668900 has 288 divisors, whose sum is σ = 6221824000. Its totient is φ = 444787200.

The previous prime is 1900668877. The next prime is 1900668923. The reversal of 1900668900 is 98660091.

It is an interprime number because it is at equal distance from previous prime (1900668877) and next prime (1900668923).

It is a super-2 number, since 2×1900668900² = 7225084534854420000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 9551001 + ... + 9551199.

Almost surely, 2^1900668900 is an apocalyptic number.

1900668900 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 1900668900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3110912000).

1900668900 is an abundant number, since it is smaller than the sum of its proper divisors (4321155100).

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

1900668900 is a wasteful number, since it uses less digits than its factorization.

1900668900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 339 (or 332 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 39.

The square root of 1900668900 is about 43596.6615694367. The cubic root of 1900668900 is about 1238.7076589528.

The spelling of 1900668900 in words is "one billion, nine hundred million, six hundred sixty-eight thousand, nine hundred".