172864144 has 10 divisors (see below), whose sum is σ = 334924310. Its totient is φ = 86432064.

The previous prime is 172864141. The next prime is 172864169. The reversal of 172864144 is 441468271.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 163328400 + 9535744 = 12780^2 + 3088^2 .

It is not an unprimeable number, because it can be changed into a prime (172864141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5401989 + ... + 5402020.

It is an arithmetic number, because the mean of its divisors is an integer number (33492431).

Almost surely, 2^172864144 is an apocalyptic number.

It is an amenable number.

172864144 is a deficient number, since it is larger than the sum of its proper divisors (162060166).

172864144 is a wasteful number, since it uses less digits than its factorization.

172864144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10804017 (or 10804011 counting only the distinct ones).

The product of its digits is 43008, while the sum is 37.

The square root of 172864144 is about 13147.7809534537. The cubic root of 172864144 is about 557.0595705063.

The spelling of 172864144 in words is "one hundred seventy-two million, eight hundred sixty-four thousand, one hundred forty-four".