1922278 has 4 divisors (see below), whose sum is σ = 2883420. Its totient is φ = 961138.

The previous prime is 1922273. The next prime is 1922329. The reversal of 1922278 is 8722291.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1922273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 480568 + ... + 480571.

It is an arithmetic number, because the mean of its divisors is an integer number (720855).

2^1922278 is an apocalyptic number.

1922278 is a deficient number, since it is larger than the sum of its proper divisors (961142).

1922278 is an equidigital number, since it uses as much as digits as its factorization.

1922278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 961141.

The product of its digits is 4032, while the sum is 31.

The square root of 1922278 is about 1386.4624048275. The cubic root of 1922278 is about 124.3384355030.

The spelling of 1922278 in words is "one million, nine hundred twenty-two thousand, two hundred seventy-eight".