26640072 has 48 divisors (see below), whose sum is σ = 75291840. Its totient is φ = 8493408.

The previous prime is 26640041. The next prime is 26640073. The reversal of 26640072 is 27004662.

It is not an unprimeable number, because it can be changed into a prime (26640073) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6388 + ... + 9699.

It is an arithmetic number, because the mean of its divisors is an integer number (1568580).

Almost surely, 2^26640072 is an apocalyptic number.

It is an amenable number.

26640072 is an abundant number, since it is smaller than the sum of its proper divisors (48651768).

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

26640072 is a wasteful number, since it uses less digits than its factorization.

26640072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16122 (or 16115 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 27.

The square root of 26640072 is about 5161.4021350792. The cubic root of 26640072 is about 298.6609655144.

The spelling of 26640072 in words is "twenty-six million, six hundred forty thousand, seventy-two".