1622656 has 32 divisors (see below), whose sum is σ = 3696480. Its totient is φ = 695040.

The previous prime is 1622641. The next prime is 1622659. The reversal of 1622656 is 6562261.

It is a tau number, because it is divible by the number of its divisors (32).

It is a Harshad number since it is a multiple of its sum of digits (28).

It is not an unprimeable number, because it can be changed into a prime (1622659) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10 + ... + 1801.

It is an arithmetic number, because the mean of its divisors is an integer number (115515).

2^1622656 is an apocalyptic number.

1622656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1622656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1848240).

1622656 is an abundant number, since it is smaller than the sum of its proper divisors (2073824).

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

1622656 is an equidigital number, since it uses as much as digits as its factorization.

1622656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1832 (or 1820 counting only the distinct ones).

The product of its digits is 4320, while the sum is 28.

The square root of 1622656 is about 1273.8351541703. The cubic root of 1622656 is about 117.5101786867.

It can be divided in two parts, 1622 and 656, that added together give a triangular number (2278 = T₆₇).

The spelling of 1622656 in words is "one million, six hundred twenty-two thousand, six hundred fifty-six".