1022100644 has 12 divisors (see below), whose sum is σ = 1832302668. Its totient is φ = 498585600.

The previous prime is 1022100637. The next prime is 1022100671. The reversal of 1022100644 is 4460012201.

It can be written as a sum of positive squares in 2 ways, for example, as 78996544 + 943104100 = 8888^2 + 30710^2 .

It is a super-3 number, since 3×1022100644³ (a number of 28 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3115997 + ... + 3116324.

It is an arithmetic number, because the mean of its divisors is an integer number (152691889).

Almost surely, 2^1022100644 is an apocalyptic number.

It is an amenable number.

1022100644 is a deficient number, since it is larger than the sum of its proper divisors (810202024).

1022100644 is a wasteful number, since it uses less digits than its factorization.

1022100644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6232366 (or 6232364 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 1022100644 is about 31970.3087879989. The cubic root of 1022100644 is about 1007.3132670774.

Adding to 1022100644 its reverse (4460012201), we get a palindrome (5482112845).

The spelling of 1022100644 in words is "one billion, twenty-two million, one hundred thousand, six hundred forty-four".