172828407 has 8 divisors (see below), whose sum is σ = 236058480. Its totient is φ = 112408640.

The previous prime is 172828363. The next prime is 172828423. The reversal of 172828407 is 704828271.

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 172828407 - 2¹⁴ = 172812023 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172828507) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 702432 + ... + 702677.

It is an arithmetic number, because the mean of its divisors is an integer number (29507310).

Almost surely, 2^172828407 is an apocalyptic number.

172828407 is a deficient number, since it is larger than the sum of its proper divisors (63230073).

172828407 is a wasteful number, since it uses less digits than its factorization.

172828407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1405153.

The product of its (nonzero) digits is 50176, while the sum is 39.

The square root of 172828407 is about 13146.4218325748. The cubic root of 172828407 is about 557.0211800311.

It can be divided in two parts, 1728 and 28407, that added together give a triangular number (30135 = T₂₄₅).

The spelling of 172828407 in words is "one hundred seventy-two million, eight hundred twenty-eight thousand, four hundred seven".