40749806 has 4 divisors (see below), whose sum is σ = 61124712. Its totient is φ = 20374902.

The previous prime is 40749803. The next prime is 40749809. The reversal of 40749806 is 60894704.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (40749803) and next prime (40749809).

It is a self number, because there is not a number n which added to its sum of digits gives 40749806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40749803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10187450 + ... + 10187453.

It is an arithmetic number, because the mean of its divisors is an integer number (15281178).

Almost surely, 2^40749806 is an apocalyptic number.

40749806 is a deficient number, since it is larger than the sum of its proper divisors (20374906).

40749806 is a wasteful number, since it uses less digits than its factorization.

40749806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20374905.

The product of its (nonzero) digits is 48384, while the sum is 38.

The square root of 40749806 is about 6383.5574721310. The cubic root of 40749806 is about 344.1188914357.

The spelling of 40749806 in words is "forty million, seven hundred forty-nine thousand, eight hundred six".