26987740 has 48 divisors (see below), whose sum is σ = 63701568. Its totient is φ = 9529344.

The previous prime is 26987731. The next prime is 26987773. The reversal of 26987740 is 4778962.

It is a super-2 number, since 2×26987740² = 1456676220615200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3724 + ... + 8236.

It is an arithmetic number, because the mean of its divisors is an integer number (1327116).

Almost surely, 2^26987740 is an apocalyptic number.

26987740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 26987740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31850784).

26987740 is an abundant number, since it is smaller than the sum of its proper divisors (36713828).

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

26987740 is a wasteful number, since it uses less digits than its factorization.

26987740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4558 (or 4556 counting only the distinct ones).

The product of its (nonzero) digits is 169344, while the sum is 43.

The square root of 26987740 is about 5194.9725697062. The cubic root of 26987740 is about 299.9545857181.

The spelling of 26987740 in words is "twenty-six million, nine hundred eighty-seven thousand, seven hundred forty".