1621422344 has 8 divisors (see below), whose sum is σ = 3040166910. Its totient is φ = 810711168.

The previous prime is 1621422343. The next prime is 1621422353. The reversal of 1621422344 is 4432241261.

It can be written as a sum of positive squares in only one way, i.e., 936972100 + 684450244 = 30610^2 + 26162^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (1621422343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101338889 + ... + 101338904.

Almost surely, 2^1621422344 is an apocalyptic number.

It is an amenable number.

1621422344 is a deficient number, since it is larger than the sum of its proper divisors (1418744566).

1621422344 is a wasteful number, since it uses less digits than its factorization.

1621422344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202677799 (or 202677795 counting only the distinct ones).

The product of its digits is 9216, while the sum is 29.

The square root of 1621422344 is about 40266.8889287464. Note that the first 3 decimals coincide. The cubic root of 1621422344 is about 1174.8039133174.

The spelling of 1621422344 in words is "one billion, six hundred twenty-one million, four hundred twenty-two thousand, three hundred forty-four".