190438668 has 48 divisors (see below), whose sum is σ = 564264960. Its totient is φ = 54410832.

The previous prime is 190438663. The next prime is 190438681. The reversal of 190438668 is 866834091.

It is a super-2 number, since 2×190438668² = 72533772539228448, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (190438663) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 125196 + ... + 126707.

It is an arithmetic number, because the mean of its divisors is an integer number (11755520).

Almost surely, 2^190438668 is an apocalyptic number.

190438668 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

190438668 is an abundant number, since it is smaller than the sum of its proper divisors (373826292).

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

190438668 is a wasteful number, since it uses less digits than its factorization.

190438668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251923 (or 251915 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 45.

The square root of 190438668 is about 13799.9517390460. The cubic root of 190438668 is about 575.3317989236.

The spelling of 190438668 in words is "one hundred ninety million, four hundred thirty-eight thousand, six hundred sixty-eight".