172628401 has 12 divisors (see below), whose sum is σ = 190907136. Its totient is φ = 155976920.

The previous prime is 172628383. The next prime is 172628411. The reversal of 172628401 is 104826271.

It is not a de Polignac number, because 172628401 - 2¹⁹ = 172104113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (172628411) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15936 + ... + 24478.

It is an arithmetic number, because the mean of its divisors is an integer number (15908928).

Almost surely, 2^172628401 is an apocalyptic number.

172628401 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

172628401 is a deficient number, since it is larger than the sum of its proper divisors (18278735).

172628401 is a wasteful number, since it uses less digits than its factorization.

172628401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8732 (or 8721 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 31.

The square root of 172628401 is about 13138.8127698053. The cubic root of 172628401 is about 556.8062258206.

The spelling of 172628401 in words is "one hundred seventy-two million, six hundred twenty-eight thousand, four hundred one".