1020323644 has 12 divisors (see below), whose sum is σ = 1787532768. Its totient is φ = 509600000.

The previous prime is 1020323641. The next prime is 1020323653. The reversal of 1020323644 is 4463230201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020323641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 136357 + ... + 143644.

It is an arithmetic number, because the mean of its divisors is an integer number (148961064).

Almost surely, 2^1020323644 is an apocalyptic number.

It is an amenable number.

1020323644 is a deficient number, since it is larger than the sum of its proper divisors (767209124).

1020323644 is a wasteful number, since it uses less digits than its factorization.

1020323644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280916 (or 280914 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 25.

The square root of 1020323644 is about 31942.5052868431. The cubic root of 1020323644 is about 1006.7291647722.

Adding to 1020323644 its reverse (4463230201), we get a palindrome (5483553845).

The spelling of 1020323644 in words is "one billion, twenty million, three hundred twenty-three thousand, six hundred forty-four".