26720243 has 16 divisors (see below), whose sum is σ = 31591296. Its totient is φ = 22323840.

The previous prime is 26720237. The next prime is 26720303. The reversal of 26720243 is 34202762.

It is not a de Polignac number, because 26720243 - 2¹⁰ = 26719219 is a prime.

It is not an unprimeable number, because it can be changed into a prime (26720143) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6380 + ... + 9702.

It is an arithmetic number, because the mean of its divisors is an integer number (1974456).

Almost surely, 2^26720243 is an apocalyptic number.

26720243 is a deficient number, since it is larger than the sum of its proper divisors (4871053).

26720243 is a wasteful number, since it uses less digits than its factorization.

26720243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3394.

The product of its (nonzero) digits is 4032, while the sum is 26.

The square root of 26720243 is about 5169.1626981553. The cubic root of 26720243 is about 298.9602636202.

The spelling of 26720243 in words is "twenty-six million, seven hundred twenty thousand, two hundred forty-three".