191478442 has 8 divisors (see below), whose sum is σ = 290006496. Its totient is φ = 94809612.

The previous prime is 191478439. The next prime is 191478457. The reversal of 191478442 is 244874191.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 191478395 and 191478404.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 464548 + ... + 464959.

It is an arithmetic number, because the mean of its divisors is an integer number (36250812).

Almost surely, 2^191478442 is an apocalyptic number.

191478442 is a deficient number, since it is larger than the sum of its proper divisors (98528054).

191478442 is a wasteful number, since it uses less digits than its factorization.

191478442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 929612.

The product of its digits is 64512, while the sum is 40.

The square root of 191478442 is about 13837.5735589734. The cubic root of 191478442 is about 576.3769816296.

The spelling of 191478442 in words is "one hundred ninety-one million, four hundred seventy-eight thousand, four hundred forty-two".