26731480 has 64 divisors (see below), whose sum is σ = 67068000. Its totient is φ = 9529344.

The previous prime is 26731469. The next prime is 26731483. The reversal of 26731480 is 8413762.

26731480 = 168² + 169² + ... + 439².

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26731483) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11886 + ... + 13954.

Almost surely, 2^26731480 is an apocalyptic number.

26731480 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 26731480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33534000).

26731480 is an abundant number, since it is smaller than the sum of its proper divisors (40336520).

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

26731480 is a wasteful number, since it uses less digits than its factorization.

26731480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2116 (or 2112 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 26731480 is about 5170.2495104202. The cubic root of 26731480 is about 299.0021662539.

The spelling of 26731480 in words is "twenty-six million, seven hundred thirty-one thousand, four hundred eighty".