1622772 has 18 divisors (see below), whose sum is σ = 4102098. Its totient is φ = 540912.

The previous prime is 1622749. The next prime is 1622773. The reversal of 1622772 is 2772261.

It can be written as a sum of positive squares in only one way, i.e., 1425636 + 197136 = 1194^2 + 444^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1622773) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 22503 + ... + 22574.

2^1622772 is an apocalyptic number.

1622772 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1622772 is an abundant number, since it is smaller than the sum of its proper divisors (2479326).

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

1622772 is a wasteful number, since it uses less digits than its factorization.

1622772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45087 (or 45082 counting only the distinct ones).

The product of its digits is 2352, while the sum is 27.

The square root of 1622772 is about 1273.8806851507. The cubic root of 1622772 is about 117.5129787987.

The spelling of 1622772 in words is "one million, six hundred twenty-two thousand, seven hundred seventy-two".