40209746 has 8 divisors (see below), whose sum is σ = 60450300. Its totient is φ = 20059648.

The previous prime is 40209733. The next prime is 40209751. The reversal of 40209746 is 64790204.

It can be written as a sum of positive squares in 2 ways, for example, as 34869025 + 5340721 = 5905^2 + 2311^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21491 + ... + 23286.

Almost surely, 2^40209746 is an apocalyptic number.

40209746 is a deficient number, since it is larger than the sum of its proper divisors (20240554).

40209746 is a wasteful number, since it uses less digits than its factorization.

40209746 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45228.

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 40209746 is about 6341.1155170049. The cubic root of 40209746 is about 342.5919152318.

The spelling of 40209746 in words is "forty million, two hundred nine thousand, seven hundred forty-six".