26998560 has 72 divisors (see below), whose sum is σ = 92137500. Its totient is φ = 7199232.

The previous prime is 26998547. The next prime is 26998583. The reversal of 26998560 is 6589962.

It can be written as a sum of positive squares in 2 ways, for example, as 26998416 + 144 = 5196^2 + 12^2 .

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7935 + ... + 10814.

Almost surely, 2^26998560 is an apocalyptic number.

26998560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26998560 is an abundant number, since it is smaller than the sum of its proper divisors (65138940).

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

26998560 is a wasteful number, since it uses less digits than its factorization.

26998560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18770 (or 18759 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 45.

The square root of 26998560 is about 5196.0138567945. The cubic root of 26998560 is about 299.9946665718.

The spelling of 26998560 in words is "twenty-six million, nine hundred ninety-eight thousand, five hundred sixty".