263672644 has 27 divisors (see below), whose sum is σ = 483731773. Its totient is φ = 125747072.

The previous prime is 263672609. The next prime is 263672653. The reversal of 263672644 is 446276362.

The square root of 263672644 is 16238.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 107122500 + 156550144 = 10350^2 + 12512^2 .

It is a Duffinian number.

Its product of digits (290304) is a multiple of the sum of its prime divisors (378).

It is a junction number, because it is equal to n+sod(n) for n = 263672597 and 263672606.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 746772 + ... + 747124.

Almost surely, 2^263672644 is an apocalyptic number.

263672644 is the 16238-th square number.

It is an amenable number.

263672644 is a deficient number, since it is larger than the sum of its proper divisors (220059129).

263672644 is an equidigital number, since it uses as much as digits as its factorization.

263672644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 756 (or 378 counting only the distinct ones).

The product of its digits is 290304, while the sum is 40.

The cubic root of 263672644 is about 641.2416033971.

The spelling of 263672644 in words is "two hundred sixty-three million, six hundred seventy-two thousand, six hundred forty-four".