40181307 has 16 divisors (see below), whose sum is σ = 55651200. Its totient is φ = 25768512.

The previous prime is 40181303. The next prime is 40181341. The reversal of 40181307 is 70318104.

It is not a de Polignac number, because 40181307 - 2² = 40181303 is a prime.

It is a super-2 number, since 2×40181307² = 3229074864456498, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (40181303) 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, 6319 + ... + 10967.

It is an arithmetic number, because the mean of its divisors is an integer number (3478200).

Almost surely, 2^40181307 is an apocalyptic number.

40181307 is a deficient number, since it is larger than the sum of its proper divisors (15469893).

40181307 is a wasteful number, since it uses less digits than its factorization.

40181307 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4762.

The product of its (nonzero) digits is 672, while the sum is 24.

The square root of 40181307 is about 6338.8726915754. The cubic root of 40181307 is about 342.5111282725.

The spelling of 40181307 in words is "forty million, one hundred eighty-one thousand, three hundred seven".