263165430 has 128 divisors (see below), whose sum is σ = 722234880. Its totient is φ = 60784640.

The previous prime is 263165411. The next prime is 263165431. The reversal of 263165430 is 34561362.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (263165431) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1023862 + ... + 1024118.

It is an arithmetic number, because the mean of its divisors is an integer number (5642460).

Almost surely, 2^263165430 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 263165430, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (361117440).

263165430 is an abundant number, since it is smaller than the sum of its proper divisors (459069450).

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

263165430 is a wasteful number, since it uses less digits than its factorization.

263165430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 414.

The product of its (nonzero) digits is 12960, while the sum is 30.

The square root of 263165430 is about 16222.3743638223. The cubic root of 263165430 is about 640.8301645633.

The spelling of 263165430 in words is "two hundred sixty-three million, one hundred sixty-five thousand, four hundred thirty".