26981145 has 24 divisors (see below), whose sum is σ = 46969416. Its totient is φ = 14327808.

The previous prime is 26981137. The next prime is 26981147. The reversal of 26981145 is 54118962.

It can be written as a sum of positive squares in 4 ways, for example, as 7901721 + 19079424 = 2811^2 + 4368^2 .

It is not a de Polignac number, because 26981145 - 2³ = 26981137 is a prime.

It is a super-2 number, since 2×26981145² = 1455964371022050, which contains 22 as substring.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (26981147) 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, 10399 + ... + 12731.

It is an arithmetic number, because the mean of its divisors is an integer number (1957059).

Almost surely, 2^26981145 is an apocalyptic number.

It is an amenable number.

26981145 is a deficient number, since it is larger than the sum of its proper divisors (19988271).

26981145 is a wasteful number, since it uses less digits than its factorization.

26981145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2601 (or 2598 counting only the distinct ones).

The product of its digits is 17280, while the sum is 36.

The square root of 26981145 is about 5194.3377826245. The cubic root of 26981145 is about 299.9301504047.

The spelling of 26981145 in words is "twenty-six million, nine hundred eighty-one thousand, one hundred forty-five".