1869390000 has 150 divisors (see below), whose sum is σ = 6537841596. Its totient is φ = 498480000.

The previous prime is 1869389983. The next prime is 1869390001. The reversal of 1869390000 is 939681.

It is a tau number, because it is divible by the number of its divisors (150).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (1869390001) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 79615 + ... + 100385.

Almost surely, 2^1869390000 is an apocalyptic number.

1869390000 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 1869390000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3268920798).

1869390000 is an abundant number, since it is smaller than the sum of its proper divisors (4668451596).

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

1869390000 is a wasteful number, since it uses less digits than its factorization.

1869390000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20805 (or 20781 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 1869390000 is about 43236.4429619274. The cubic root of 1869390000 is about 1231.8749908297.

The spelling of 1869390000 in words is "one billion, eight hundred sixty-nine million, three hundred ninety thousand".