172404946728 has 48 divisors (see below), whose sum is σ = 533634360480. Its totient is φ = 49258556064.

The previous prime is 172404946711. The next prime is 172404946729. The reversal of 172404946728 is 827649404271.

172404946728 is a `hidden beast` number, since 1 + 72 + 4 + 0 + 494 + 67 + 28 = 666.

It is not an unprimeable number, because it can be changed into a prime (172404946729) 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, 171036150 + ... + 171037157.

It is an arithmetic number, because the mean of its divisors is an integer number (11117382510).

Almost surely, 2^172404946728 is an apocalyptic number.

172404946728 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

172404946728 is an abundant number, since it is smaller than the sum of its proper divisors (361229413752).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

172404946728 is a wasteful number, since it uses less digits than its factorization.

172404946728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342073326 (or 342073319 counting only the distinct ones).

The product of its (nonzero) digits is 5419008, while the sum is 54.

The spelling of 172404946728 in words is "one hundred seventy-two billion, four hundred four million, nine hundred forty-six thousand, seven hundred twenty-eight".