1023406644 has 24 divisors (see below), whose sum is σ = 2571637600. Its totient is φ = 314894304.

The previous prime is 1023406621. The next prime is 1023406651. The reversal of 1023406644 is 4466043201.

It is a super-2 number, since 2×1023406644² = 2094722317966685472, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3279994 + ... + 3280305.

Almost surely, 2^1023406644 is an apocalyptic number.

It is an amenable number.

1023406644 is an abundant number, since it is smaller than the sum of its proper divisors (1548230956).

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

1023406644 is a wasteful number, since it uses less digits than its factorization.

1023406644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6560319 (or 6560317 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 30.

The square root of 1023406644 is about 31990.7274690652. The cubic root of 1023406644 is about 1007.7421195627.

Adding to 1023406644 its reverse (4466043201), we get a palindrome (5489449845).

The spelling of 1023406644 in words is "one billion, twenty-three million, four hundred six thousand, six hundred forty-four".