1622478 has 64 divisors (see below), whose sum is σ = 3999744. Its totient is φ = 432000.

The previous prime is 1622473. The next prime is 1622479. The reversal of 1622478 is 8742261.

It is a d-powerful number, because it can be written as 1 + 6 + 2⁵ + 2¹⁹ + 4¹⁰ + 7⁵ + 8⁵ .

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1622471) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 26568 + ... + 26628.

It is an arithmetic number, because the mean of its divisors is an integer number (62496).

2^1622478 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1622478, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1999872).

1622478 is an abundant number, since it is smaller than the sum of its proper divisors (2377266).

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

1622478 is a wasteful number, since it uses less digits than its factorization.

1622478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121.

The product of its digits is 5376, while the sum is 30.

The square root of 1622478 is about 1273.7652845010. The cubic root of 1622478 is about 117.5058817035.

The spelling of 1622478 in words is "one million, six hundred twenty-two thousand, four hundred seventy-eight".