190489590 has 128 divisors (see below), whose sum is σ = 549918720. Its totient is φ = 46738944.

The previous prime is 190489577. The next prime is 190489591. The reversal of 190489590 is 95984091.

190489590 is a `hidden beast` number, since 19 + 0 + 48 + 9 + 590 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (190489591) 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 63 ways as a sum of consecutive naturals, for example, 215289 + ... + 216171.

It is an arithmetic number, because the mean of its divisors is an integer number (4296240).

Almost surely, 2^190489590 is an apocalyptic number.

190489590 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 190489590, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (274959360).

190489590 is an abundant number, since it is smaller than the sum of its proper divisors (359429130).

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

190489590 is a wasteful number, since it uses less digits than its factorization.

190489590 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 963 (or 957 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 45.

The square root of 190489590 is about 13801.7966221793. The cubic root of 190489590 is about 575.3830742857.

The spelling of 190489590 in words is "one hundred ninety million, four hundred eighty-nine thousand, five hundred ninety".