26299840 has 112 divisors (see below), whose sum is σ = 73152000. Its totient is φ = 8819712.

The previous prime is 26299831. The next prime is 26299853. The reversal of 26299840 is 4899262.

It is a tau number, because it is divible by the number of its divisors (112).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 26299793 and 26299802.

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, 132061 + ... + 132259.

Almost surely, 2^26299840 is an apocalyptic number.

26299840 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 26299840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36576000).

26299840 is an abundant number, since it is smaller than the sum of its proper divisors (46852160).

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

26299840 is a wasteful number, since it uses less digits than its factorization.

26299840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 282 (or 272 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 40.

The square root of 26299840 is about 5128.3369624080. The cubic root of 26299840 is about 297.3840708302.

The spelling of 26299840 in words is "twenty-six million, two hundred ninety-nine thousand, eight hundred forty".