919900000 has 72 divisors (see below), whose sum is σ = 2263917600. Its totient is φ = 367920000.

The previous prime is 919899979. The next prime is 919900001. The reversal of 919900000 is 9919.

919900000 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (919900001) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 95401 + ... + 104599.

It is an arithmetic number, because the mean of its divisors is an integer number (31443300).

Almost surely, 2^919900000 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 919900000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1131958800).

919900000 is an abundant number, since it is smaller than the sum of its proper divisors (1344017600).

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

919900000 is an frugal number, since it uses more digits than its factorization.

919900000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9234 (or 9206 counting only the distinct ones).

The product of its (nonzero) digits is 729, while the sum is 28.

The square root of 919900000 is about 30329.8532802254. The cubic root of 919900000 is about 972.5535862164.

Adding to 919900000 its reverse (9919), we get a palindrome (919909919).

The spelling of 919900000 in words is "nine hundred nineteen million, nine hundred thousand".