6440172 has 24 divisors (see below), whose sum is σ = 15083376. Its totient is φ = 2138688.

The previous prime is 6440171. The next prime is 6440177. The reversal of 6440172 is 2710446.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (6440171) 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, 2958 + ... + 4650.

It is an arithmetic number, because the mean of its divisors is an integer number (628474).

Almost surely, 2^6440172 is an apocalyptic number.

It is an amenable number.

6440172 is an abundant number, since it is smaller than the sum of its proper divisors (8643204).

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

6440172 is a wasteful number, since it uses less digits than its factorization.

6440172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2017 (or 2015 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 24.

The square root of 6440172 is about 2537.7493966111. The cubic root of 6440172 is about 186.0512056960.

The spelling of 6440172 in words is "six million, four hundred forty thousand, one hundred seventy-two".