26493981 has 8 divisors (see below), whose sum is σ = 35355360. Its totient is φ = 17647632.

The previous prime is 26493979. The next prime is 26493997. The reversal of 26493981 is 18939462.

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

It is not a de Polignac number, because 26493981 - 2¹ = 26493979 is a prime.

It is a super-2 number, since 2×26493981² = 1403862058456722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26493911) 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, 1351 + ... + 7403.

It is an arithmetic number, because the mean of its divisors is an integer number (4419420).

Almost surely, 2^26493981 is an apocalyptic number.

It is an amenable number.

26493981 is a deficient number, since it is larger than the sum of its proper divisors (8861379).

26493981 is a wasteful number, since it uses less digits than its factorization.

26493981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7515.

The product of its digits is 93312, while the sum is 42.

The square root of 26493981 is about 5147.2304203329. The cubic root of 26493981 is about 298.1140240499.

The spelling of 26493981 in words is "twenty-six million, four hundred ninety-three thousand, nine hundred eighty-one".