26220815 has 8 divisors (see below), whose sum is σ = 31641840. Its totient is φ = 20858752.

The previous prime is 26220809. The next prime is 26220833. The reversal of 26220815 is 51802262.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 26220815 - 2⁶ = 26220751 is a prime.

It is a super-2 number, since 2×26220815² = 1375062278528450, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13754 + ... + 15543.

It is an arithmetic number, because the mean of its divisors is an integer number (3955230).

Almost surely, 2^26220815 is an apocalyptic number.

26220815 is a deficient number, since it is larger than the sum of its proper divisors (5421025).

26220815 is a wasteful number, since it uses less digits than its factorization.

26220815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29481.

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 26220815 is about 5120.6264265224. The cubic root of 26220815 is about 297.0859149768.

The spelling of 26220815 in words is "twenty-six million, two hundred twenty thousand, eight hundred fifteen".