194297428 has 18 divisors (see below), whose sum is σ = 366365454. Its totient is φ = 89629344.

The previous prime is 194297377. The next prime is 194297459. The reversal of 194297428 is 824792491.

It can be written as a sum of positive squares in 3 ways, for example, as 27060804 + 167236624 = 5202^2 + 12932^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 99550 + ... + 101482.

Almost surely, 2^194297428 is an apocalyptic number.

It is an amenable number.

194297428 is a deficient number, since it is larger than the sum of its proper divisors (172068026).

194297428 is an equidigital number, since it uses as much as digits as its factorization.

194297428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3883 (or 1948 counting only the distinct ones).

The product of its digits is 290304, while the sum is 46.

The square root of 194297428 is about 13939.0612309438. The cubic root of 194297428 is about 579.1917278829.

The spelling of 194297428 in words is "one hundred ninety-four million, two hundred ninety-seven thousand, four hundred twenty-eight".