26628520 has 16 divisors (see below), whose sum is σ = 59914260. Its totient is φ = 10651392.

The previous prime is 26628517. The next prime is 26628521. The reversal of 26628520 is 2582662.

It can be written as a sum of positive squares in 2 ways, for example, as 26440164 + 188356 = 5142^2 + 434^2 .

It is not an unprimeable number, because it can be changed into a prime (26628521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 332817 + ... + 332896.

Almost surely, 2^26628520 is an apocalyptic number.

26628520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26628520 is an abundant number, since it is smaller than the sum of its proper divisors (33285740).

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

26628520 is a wasteful number, since it uses less digits than its factorization.

26628520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 665724 (or 665720 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 31.

The square root of 26628520 is about 5160.2829379793. The cubic root of 26628520 is about 298.6177895764.

The spelling of 26628520 in words is "twenty-six million, six hundred twenty-eight thousand, five hundred twenty".