40072173 has 16 divisors (see below), whose sum is σ = 55176000. Its totient is φ = 25853184.

The previous prime is 40072169. The next prime is 40072177. The reversal of 40072173 is 37127004.

It is an interprime number because it is at equal distance from previous prime (40072169) and next prime (40072177).

It is not a de Polignac number, because 40072173 - 2² = 40072169 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40072177) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13203 + ... + 15951.

It is an arithmetic number, because the mean of its divisors is an integer number (3448500).

Almost surely, 2^40072173 is an apocalyptic number.

40072173 is a gapful number since it is divisible by the number (43) formed by its first and last digit.

It is an amenable number.

40072173 is a deficient number, since it is larger than the sum of its proper divisors (15103827).

40072173 is a wasteful number, since it uses less digits than its factorization.

40072173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2908.

The product of its (nonzero) digits is 1176, while the sum is 24.

The square root of 40072173 is about 6330.2585255264. The cubic root of 40072173 is about 342.2007559052.

Adding to 40072173 its reverse (37127004), we get a palindrome (77199177).

The spelling of 40072173 in words is "forty million, seventy-two thousand, one hundred seventy-three".