194188864 has 28 divisors (see below), whose sum is σ = 391668508. Its totient is φ = 95500800.

The previous prime is 194188861. The next prime is 194188871. The reversal of 194188864 is 468881491.

It can be written as a sum of positive squares in 2 ways, for example, as 88510464 + 105678400 = 9408^2 + 10280^2 .

It is a super-2 number, since 2×194188864² = 75418629803220992, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (194188861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20967 + ... + 28774.

It is an arithmetic number, because the mean of its divisors is an integer number (13988161).

Almost surely, 2^194188864 is an apocalyptic number.

It is an amenable number.

194188864 is an abundant number, since it is smaller than the sum of its proper divisors (197479644).

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

194188864 is an equidigital number, since it uses as much as digits as its factorization.

194188864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49814 (or 49804 counting only the distinct ones).

The product of its digits is 442368, while the sum is 49.

The square root of 194188864 is about 13935.1664503873. The cubic root of 194188864 is about 579.0838330155.

It can be divided in two parts, 19418 and 8864, that added together give a palindrome (28282).

The spelling of 194188864 in words is "one hundred ninety-four million, one hundred eighty-eight thousand, eight hundred sixty-four".