172268405 has 8 divisors (see below), whose sum is σ = 206890200. Its totient is φ = 137702656.

The previous prime is 172268357. The next prime is 172268417. The reversal of 172268405 is 504862271.

172268405 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 48413764 + 123854641 = 6958^2 + 11129^2 .

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 172268405 - 2¹⁶ = 172202869 is a prime.

It is a super-2 number, since 2×172268405² = 59352806722488050, 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, 6920 + ... + 19809.

It is an arithmetic number, because the mean of its divisors is an integer number (25861275).

Almost surely, 2^172268405 is an apocalyptic number.

It is an amenable number.

172268405 is a deficient number, since it is larger than the sum of its proper divisors (34621795).

172268405 is a wasteful number, since it uses less digits than its factorization.

172268405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28023.

The product of its (nonzero) digits is 26880, while the sum is 35.

The square root of 172268405 is about 13125.1059043346. The cubic root of 172268405 is about 556.4189054040.

The spelling of 172268405 in words is "one hundred seventy-two million, two hundred sixty-eight thousand, four hundred five".