40329749 has 4 divisors (see below), whose sum is σ = 41720460. Its totient is φ = 38939040.

The previous prime is 40329733. The next prime is 40329781. The reversal of 40329749 is 94792304.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 23107249 + 17222500 = 4807^2 + 4150^2 .

It is a cyclic number.

It is not a de Polignac number, because 40329749 - 2⁴ = 40329733 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40329719) 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, 695312 + ... + 695369.

It is an arithmetic number, because the mean of its divisors is an integer number (10430115).

Almost surely, 2^40329749 is an apocalyptic number.

It is an amenable number.

40329749 is a deficient number, since it is larger than the sum of its proper divisors (1390711).

40329749 is a wasteful number, since it uses less digits than its factorization.

40329749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1390710.

The product of its (nonzero) digits is 54432, while the sum is 38.

The square root of 40329749 is about 6350.5707617505. The cubic root of 40329749 is about 342.9323901227.

The spelling of 40329749 in words is "forty million, three hundred twenty-nine thousand, seven hundred forty-nine".