26640312 has 16 divisors (see below), whose sum is σ = 66600840. Its totient is φ = 8880096.

The previous prime is 26640287. The next prime is 26640353. The reversal of 26640312 is 21304662.

It is a Harshad number since it is a multiple of its sum of digits (24), and also a Moran number because the ratio is a prime number: 1110013 = 26640312 / (2 + 6 + 6 + 4 + 0 + 3 + 1 + 2).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 554983 + ... + 555030.

Almost surely, 2^26640312 is an apocalyptic number.

It is an amenable number.

26640312 is an abundant number, since it is smaller than the sum of its proper divisors (39960528).

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

26640312 is a wasteful number, since it uses less digits than its factorization.

26640312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1110022 (or 1110018 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 26640312 is about 5161.4253845232. The cubic root of 26640312 is about 298.6618623891.

Adding to 26640312 its reverse (21304662), we get a palindrome (47944974).

The spelling of 26640312 in words is "twenty-six million, six hundred forty thousand, three hundred twelve".