194430440 has 16 divisors (see below), whose sum is σ = 437468580. Its totient is φ = 77772160.

The previous prime is 194430437. The next prime is 194430443. The reversal of 194430440 is 44034491.

It is an interprime number because it is at equal distance from previous prime (194430437) and next prime (194430443).

It can be written as a sum of positive squares in 2 ways, for example, as 194379364 + 51076 = 13942^2 + 226^2 .

It is not an unprimeable number, because it can be changed into a prime (194430443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2430341 + ... + 2430420.

Almost surely, 2^194430440 is an apocalyptic number.

194430440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

194430440 is an abundant number, since it is smaller than the sum of its proper divisors (243038140).

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

194430440 is a wasteful number, since it uses less digits than its factorization.

194430440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4860772 (or 4860768 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 194430440 is about 13943.8316111462. The cubic root of 194430440 is about 579.3238652932.

The spelling of 194430440 in words is "one hundred ninety-four million, four hundred thirty thousand, four hundred forty".