919490190 has 48 divisors (see below), whose sum is σ = 2262037104. Its totient is φ = 239203840.

The previous prime is 919490183. The next prime is 919490191. The reversal of 919490190 is 91094919.

It is a super-2 number, since 2×919490190² = 1690924419012472200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (919490191) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 41314 + ... + 59546.

It is an arithmetic number, because the mean of its divisors is an integer number (47125773).

Almost surely, 2^919490190 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 919490190, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1131018552).

919490190 is an abundant number, since it is smaller than the sum of its proper divisors (1342546914).

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

919490190 is a wasteful number, since it uses less digits than its factorization.

919490190 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18325 (or 18284 counting only the distinct ones).

The product of its (nonzero) digits is 26244, while the sum is 42.

The square root of 919490190 is about 30323.0966426584. The cubic root of 919490190 is about 972.4091424778.

The spelling of 919490190 in words is "nine hundred nineteen million, four hundred ninety thousand, one hundred ninety".