26881921 has 8 divisors (see below), whose sum is σ = 29394144. Its totient is φ = 24381120.

The previous prime is 26881919. The next prime is 26881969. The reversal of 26881921 is 12918862.

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

It is a cyclic number.

It is not a de Polignac number, because 26881921 - 2¹ = 26881919 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26881021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2521 + ... + 7753.

It is an arithmetic number, because the mean of its divisors is an integer number (3674268).

Almost surely, 2^26881921 is an apocalyptic number.

It is an amenable number.

26881921 is a deficient number, since it is larger than the sum of its proper divisors (2512223).

26881921 is a wasteful number, since it uses less digits than its factorization.

26881921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5711.

The product of its digits is 13824, while the sum is 37.

The square root of 26881921 is about 5184.7778158760. Note that the first 3 decimals coincide. The cubic root of 26881921 is about 299.5620312929.

The spelling of 26881921 in words is "twenty-six million, eight hundred eighty-one thousand, nine hundred twenty-one".