263890164 has 24 divisors (see below), whose sum is σ = 648151840. Its totient is φ = 83333664.

The previous prime is 263890163. The next prime is 263890171. The reversal of 263890164 is 461098362.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (263890163) 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 7 ways as a sum of consecutive naturals, for example, 578479 + ... + 578934.

Almost surely, 2^263890164 is an apocalyptic number.

It is an amenable number.

263890164 is an abundant number, since it is smaller than the sum of its proper divisors (384261676).

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

263890164 is a wasteful number, since it uses less digits than its factorization.

263890164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1157439 (or 1157437 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 39.

The square root of 263890164 is about 16244.6964883928. The cubic root of 263890164 is about 641.4178883199.

The spelling of 263890164 in words is "two hundred sixty-three million, eight hundred ninety thousand, one hundred sixty-four".