26640454 has 8 divisors (see below), whose sum is σ = 39985560. Its totient is φ = 13311936.

The previous prime is 26640437. The next prime is 26640457. The reversal of 26640454 is 45404662.

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

It is a super-2 number, since 2×26640454² = 1419427578652232, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26640457) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1302 + ... + 7414.

It is an arithmetic number, because the mean of its divisors is an integer number (4998195).

Almost surely, 2^26640454 is an apocalyptic number.

26640454 is a deficient number, since it is larger than the sum of its proper divisors (13345106).

26640454 is a wasteful number, since it uses less digits than its factorization.

26640454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8294.

The product of its (nonzero) digits is 23040, while the sum is 31.

The square root of 26640454 is about 5161.4391403949. The cubic root of 26640454 is about 298.6623930374.

The spelling of 26640454 in words is "twenty-six million, six hundred forty thousand, four hundred fifty-four".