1622397841 has 9 divisors (see below), whose sum is σ = 1659587899. Its totient is φ = 1586025904.

The previous prime is 1622397827. The next prime is 1622397863. The reversal of 1622397841 is 1487932261.

The square root of 1622397841 is 40279.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 1503500625 + 118897216 = 38775^2 + 10904^2 .

It is not a de Polignac number, because 1622397841 - 2⁵ = 1622397809 is a prime.

It is a super-2 number, since 2×1622397841² = 5264349508962922562, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1622397341) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1892685 + ... + 1893541.

Almost surely, 2^1622397841 is an apocalyptic number.

1622397841 is the 40279-th square number.

1622397841 is the 20140-th centered octagonal number.

It is an amenable number.

1622397841 is a deficient number, since it is larger than the sum of its proper divisors (37190058).

1622397841 is an frugal number, since it uses more digits than its factorization.

1622397841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1808 (or 904 counting only the distinct ones).

The product of its digits is 145152, while the sum is 43.

The cubic root of 1622397841 is about 1175.0394653411.

The spelling of 1622397841 in words is "one billion, six hundred twenty-two million, three hundred ninety-seven thousand, eight hundred forty-one".