26501980 has 48 divisors (see below), whose sum is σ = 61508160. Its totient is φ = 9540608.

The previous prime is 26501939. The next prime is 26501987. The reversal of 26501980 is 8910562.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26501987) 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, 6126 + ... + 9514.

It is an arithmetic number, because the mean of its divisors is an integer number (1281420).

Almost surely, 2^26501980 is an apocalyptic number.

26501980 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 26501980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30754080).

26501980 is an abundant number, since it is smaller than the sum of its proper divisors (35006180).

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

26501980 is a wasteful number, since it uses less digits than its factorization.

26501980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3438 (or 3436 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 26501980 is about 5148.0073815021. The cubic root of 26501980 is about 298.1440229911.

The spelling of 26501980 in words is "twenty-six million, five hundred one thousand, nine hundred eighty".