26731530 has 96 divisors (see below), whose sum is σ = 80241408. Its totient is φ = 6048000.

The previous prime is 26731493. The next prime is 26731541. The reversal of 26731530 is 3513762.

It is a happy number.

It is a super-2 number, since 2×26731530² = 1429149392281800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 26731494 and 26731503.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 94990 + ... + 95270.

It is an arithmetic number, because the mean of its divisors is an integer number (835848).

Almost surely, 2^26731530 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 26731530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40120704).

26731530 is an abundant number, since it is smaller than the sum of its proper divisors (53509878).

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

26731530 is a wasteful number, since it uses less digits than its factorization.

26731530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 452 (or 449 counting only the distinct ones).

The product of its (nonzero) digits is 3780, while the sum is 27.

The square root of 26731530 is about 5170.2543457745. The cubic root of 26731530 is about 299.0023526770.

It can be divided in two parts, 26731 and 530, that added together give a triangular number (27261 = T₂₃₃).

The spelling of 26731530 in words is "twenty-six million, seven hundred thirty-one thousand, five hundred thirty".