1023643164 has 24 divisors (see below), whose sum is σ = 2514211840. Its totient is φ = 323255664.

The previous prime is 1023643163. The next prime is 1023643199. The reversal of 1023643164 is 4613463201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1023643163) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2244604 + ... + 2245059.

Almost surely, 2^1023643164 is an apocalyptic number.

It is an amenable number.

1023643164 is an abundant number, since it is smaller than the sum of its proper divisors (1490568676).

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

1023643164 is a wasteful number, since it uses less digits than its factorization.

1023643164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4489689 (or 4489687 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 30.

The square root of 1023643164 is about 31994.4239516826. The cubic root of 1023643164 is about 1007.8197468376.

The spelling of 1023643164 in words is "one billion, twenty-three million, six hundred forty-three thousand, one hundred sixty-four".