40305172 has 6 divisors (see below), whose sum is σ = 70534058. Its totient is φ = 20152584.

The previous prime is 40305121. The next prime is 40305193. The reversal of 40305172 is 27150304.

It can be written as a sum of positive squares in only one way, i.e., 23951236 + 16353936 = 4894^2 + 4044^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5038143 + ... + 5038150.

Almost surely, 2^40305172 is an apocalyptic number.

It is an amenable number.

40305172 is a deficient number, since it is larger than the sum of its proper divisors (30228886).

40305172 is a wasteful number, since it uses less digits than its factorization.

40305172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10076297 (or 10076295 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 22.

The square root of 40305172 is about 6348.6354439360. The cubic root of 40305172 is about 342.8627148235.

Adding to 40305172 its reverse (27150304), we get a palindrome (67455476).

The spelling of 40305172 in words is "forty million, three hundred five thousand, one hundred seventy-two".