40407172 has 24 divisors (see below), whose sum is σ = 76861400. Its totient is φ = 18475776.

The previous prime is 40407163. The next prime is 40407173. The reversal of 40407172 is 27170404.

It can be written as a sum of positive squares in 4 ways, for example, as 5171076 + 35236096 = 2274^2 + 5936^2 .

It is not an unprimeable number, because it can be changed into a prime (40407173) 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, 2104 + ... + 9232.

Almost surely, 2^40407172 is an apocalyptic number.

It is an amenable number.

40407172 is a deficient number, since it is larger than the sum of its proper divisors (36454228).

40407172 is a wasteful number, since it uses less digits than its factorization.

40407172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7255 (or 7253 counting only the distinct ones).

The product of its (nonzero) digits is 1568, while the sum is 25.

The square root of 40407172 is about 6356.6635902807. The cubic root of 40407172 is about 343.1516978949.

Adding to 40407172 its reverse (27170404), we get a palindrome (67577576).

The spelling of 40407172 in words is "forty million, four hundred seven thousand, one hundred seventy-two".