4220478 has 16 divisors (see below), whose sum is σ = 9378960. Its totient is φ = 1406808.

The previous prime is 4220473. The next prime is 4220483. The reversal of 4220478 is 8740224.

It is an interprime number because it is at equal distance from previous prime (4220473) and next prime (4220483).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4220473) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39025 + ... + 39132.

It is an arithmetic number, because the mean of its divisors is an integer number (586185).

Almost surely, 2^4220478 is an apocalyptic number.

4220478 is an abundant number, since it is smaller than the sum of its proper divisors (5158482).

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

4220478 is a wasteful number, since it uses less digits than its factorization.

4220478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78168 (or 78162 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 27.

The square root of 4220478 is about 2054.3801985027. The cubic root of 4220478 is about 161.6046601522.

The spelling of 4220478 in words is "four million, two hundred twenty thousand, four hundred seventy-eight".