40185706 has 16 divisors (see below), whose sum is σ = 68027040. Its totient is φ = 17636080.

The previous prime is 40185701. The next prime is 40185709. The reversal of 40185706 is 60758104.

It is a super-2 number, since 2×40185706² = 3229781933436872, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (40185701) 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, 30856 + ... + 32131.

It is an arithmetic number, because the mean of its divisors is an integer number (4251690).

Almost surely, 2^40185706 is an apocalyptic number.

40185706 is a deficient number, since it is larger than the sum of its proper divisors (27841334).

40185706 is a wasteful number, since it uses less digits than its factorization.

40185706 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63029.

The product of its (nonzero) digits is 6720, while the sum is 31.

The square root of 40185706 is about 6339.2196680664. The cubic root of 40185706 is about 342.5236270486.

The spelling of 40185706 in words is "forty million, one hundred eighty-five thousand, seven hundred six".