2022478 has 4 divisors (see below), whose sum is σ = 3033720. Its totient is φ = 1011238.

The previous prime is 2022469. The next prime is 2022481. The reversal of 2022478 is 8742202.

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

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 505618 + ... + 505621.

It is an arithmetic number, because the mean of its divisors is an integer number (758430).

2^2022478 is an apocalyptic number.

2022478 is a deficient number, since it is larger than the sum of its proper divisors (1011242).

2022478 is a wasteful number, since it uses less digits than its factorization.

2022478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1011241.

The product of its (nonzero) digits is 1792, while the sum is 25.

The square root of 2022478 is about 1422.1385305237. The cubic root of 2022478 is about 126.4623560703.

It can be divided in two parts, 20224 and 78, that added together give a palindrome (20302).

The spelling of 2022478 in words is "two million, twenty-two thousand, four hundred seventy-eight".