40394786 has 8 divisors (see below), whose sum is σ = 61273260. Its totient is φ = 19970368.

The previous prime is 40394773. The next prime is 40394789. The reversal of 40394786 is 68749304.

It can be written as a sum of positive squares in 2 ways, for example, as 39000025 + 1394761 = 6245^2 + 1181^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (40394789) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 113291 + ... + 113646.

Almost surely, 2^40394786 is an apocalyptic number.

40394786 is a deficient number, since it is larger than the sum of its proper divisors (20878474).

40394786 is a wasteful number, since it uses less digits than its factorization.

40394786 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227028.

The product of its (nonzero) digits is 145152, while the sum is 41.

The square root of 40394786 is about 6355.6892623853. The cubic root of 40394786 is about 343.1166322446.

The spelling of 40394786 in words is "forty million, three hundred ninety-four thousand, seven hundred eighty-six".