172864494 has 48 divisors (see below), whose sum is σ = 421784064. Its totient is φ = 50691600.

The previous prime is 172864469. The next prime is 172864499. The reversal of 172864494 is 494468271.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172864499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7944 + ... + 20219.

It is an arithmetic number, because the mean of its divisors is an integer number (8787168).

Almost surely, 2^172864494 is an apocalyptic number.

172864494 is an abundant number, since it is smaller than the sum of its proper divisors (248919570).

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

172864494 is a wasteful number, since it uses less digits than its factorization.

172864494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28213 (or 28210 counting only the distinct ones).

The product of its digits is 387072, while the sum is 45.

The square root of 172864494 is about 13147.7942636778. The cubic root of 172864494 is about 557.0599464676.

The spelling of 172864494 in words is "one hundred seventy-two million, eight hundred sixty-four thousand, four hundred ninety-four".