26640263 has 8 divisors (see below), whose sum is σ = 29357328. Its totient is φ = 24018624.

The previous prime is 26640247. The next prime is 26640277. The reversal of 26640263 is 36204662.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 26640263 - 2⁴ = 26640247 is a prime.

It is a super-2 number, since 2×26640263² = 1419407225418338, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26642263) 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, 23270 + ... + 24387.

It is an arithmetic number, because the mean of its divisors is an integer number (3669666).

Almost surely, 2^26640263 is an apocalyptic number.

26640263 is a deficient number, since it is larger than the sum of its proper divisors (2717065).

26640263 is a wasteful number, since it uses less digits than its factorization.

26640263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47713.

The product of its (nonzero) digits is 10368, while the sum is 29.

The square root of 26640263 is about 5161.4206377702. The cubic root of 26640263 is about 298.6616792776.

The spelling of 26640263 in words is "twenty-six million, six hundred forty thousand, two hundred sixty-three".