40345738 has 8 divisors (see below), whose sum is σ = 60628932. Its totient is φ = 20136096.

The previous prime is 40345733. The next prime is 40345751. The reversal of 40345738 is 83754304.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 32410249 + 7935489 = 5693^2 + 2817^2 .

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 (40345733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16995 + ... + 19222.

Almost surely, 2^40345738 is an apocalyptic number.

40345738 is a deficient number, since it is larger than the sum of its proper divisors (20283194).

40345738 is a wasteful number, since it uses less digits than its factorization.

40345738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36776.

The product of its (nonzero) digits is 40320, while the sum is 34.

The square root of 40345738 is about 6351.8295002306. The cubic root of 40345738 is about 342.9777034185.

The spelling of 40345738 in words is "forty million, three hundred forty-five thousand, seven hundred thirty-eight".