26720057 has 16 divisors (see below), whose sum is σ = 33008640. Its totient is φ = 21062592.

The previous prime is 26720053. The next prime is 26720059. The reversal of 26720057 is 75002762.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 26720057 - 2² = 26720053 is a prime.

It is a super-2 number, since 2×26720057² = 1427922892166498, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (26720051) 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, 43283 + ... + 43895.

It is an arithmetic number, because the mean of its divisors is an integer number (2063040).

Almost surely, 2^26720057 is an apocalyptic number.

It is an amenable number.

26720057 is a deficient number, since it is larger than the sum of its proper divisors (6288583).

26720057 is a wasteful number, since it uses less digits than its factorization.

26720057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1112.

The product of its (nonzero) digits is 5880, while the sum is 29.

The square root of 26720057 is about 5169.1447068156. The cubic root of 26720057 is about 298.9595699296.

The spelling of 26720057 in words is "twenty-six million, seven hundred twenty thousand, fifty-seven".