190920900 has 36 divisors (see below), whose sum is σ = 552398672. Its totient is φ = 50912160.

The previous prime is 190920883. The next prime is 190920901. The reversal of 190920900 is 9029091.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (190920901) 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, 317902 + ... + 318501.

Almost surely, 2^190920900 is an apocalyptic number.

190920900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

190920900 is an abundant number, since it is smaller than the sum of its proper divisors (361477772).

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

190920900 is a wasteful number, since it uses less digits than its factorization.

190920900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 636420 (or 636413 counting only the distinct ones).

The product of its (nonzero) digits is 1458, while the sum is 30.

The square root of 190920900 is about 13817.4129271727. The cubic root of 190920900 is about 575.8170112207.

Adding to 190920900 its reverse (9029091), we get a palindrome (199949991).

The spelling of 190920900 in words is "one hundred ninety million, nine hundred twenty thousand, nine hundred".