26640045 has 24 divisors (see below), whose sum is σ = 46519200. Its totient is φ = 14102496.

The previous prime is 26640041. The next prime is 26640073. The reversal of 26640045 is 54004662.

It is a happy number.

It is not a de Polignac number, because 26640045 - 2² = 26640041 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26640041) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4126 + ... + 8384.

It is an arithmetic number, because the mean of its divisors is an integer number (1938300).

Almost surely, 2^26640045 is an apocalyptic number.

It is an amenable number.

26640045 is a deficient number, since it is larger than the sum of its proper divisors (19879155).

26640045 is a wasteful number, since it uses less digits than its factorization.

26640045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4409 (or 4406 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 26640045 is about 5161.3995195102. The cubic root of 26640045 is about 298.6608646157.

The spelling of 26640045 in words is "twenty-six million, six hundred forty thousand, forty-five".